Maritime Tools & Calculators

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Maritime Tool

Admiralty Coefficient & Speed-Power Tool Ship Power, Speed & Performance Curve

Estimate propulsion power, speed and comparative ship performance using the traditional Admiralty coefficient, then move beyond the cubic-law shortcut with a fitted multi-point speed-power curve. Simple mode calculates AC, target power and predicted speed at available power. Advanced normalizes operating or trial points for displacement, fits the speed-power exponent, compares cubic and fitted models, applies operational margins, screens MCR/reserve, converts the selected power basis through the propulsion-efficiency chain and builds a full performance curve.

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A

Maritime Tool

AI Voyage Optimization ROI & Fuel Savings Break-Even Tool

Turn an AI voyage-optimization claim into a realized fleet business case. Simple mode starts with the gross technical fuel-saving opportunity and discounts it for voyage eligibility, recommendation acceptance, execution realization and platform/data availability. Advanced mode adds route-by-route economics, schedule impact, carbon value, subscription and integration cost, fleet rollout, governance and NPV sensitivity.

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A

Maritime Tool

Air Draft & Bridge Clearance Tool

Calculate vessel air draft, current or projected overhead clearance, physical separation and margin after operator-entered safety allowances. Simple mode checks one bridge quickly. Advanced derives vessel air draft from geometry if desired, handles tide/river-stage corrections, multiple bridges or overhead obstructions, local uncertainty, motion/heel/roll allowance, lowerable equipment, route bottlenecks and water-level sensitivity.

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A

Maritime Tool

Air Lubrication System Net Fuel Savings, Compressor Load & Retrofit ROI Tool

Separate gross hydrodynamic power reduction from the fuel and electrical cost of producing the air layer. Simple mode turns propulsion power, gross saving, ALS availability and compressor load into net annual fuel saved and payback. Advanced mode models multiple operating conditions, air demand, compressor capacity, generator margin, off-state drag, carbon value, retrofit cost and lifecycle NPV.

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A

Maritime Tool

Air Lubrication System ROI & Payback Calculator

Screen an air lubrication retrofit by separating gross propulsion savings from the electrical energy required to create the air layer. Compare laden and ballast operation, utilization, availability, blower or compressor demand, bunker and carbon value, retrofit cost, off-hire and multi-year lifecycle economics.

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A

Maritime Tool

Alternative Fuel Crew Training, Relief Manning & Transition Cost Tool

Budget the human side of an alternative-fuel transition. Simple mode estimates initial trainees, course cost, paid training time, travel and temporary relief/overlap. Advanced mode builds the transition role by role, checks trained-crew coverage per vessel, sizes training waves, adds refresher and turnover burden, and separates one-time transition cost from recurring competence maintenance.

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A

Maritime Tool

Alternative Fuel Crew Training, Relief Manning & Transition Cost Tool

Budget the human side of an alternative-fuel transition. Simple mode estimates initial trainees, course cost, paid training time, travel and temporary relief/overlap. Advanced mode builds the transition role by role, checks trained-crew coverage per vessel, sizes training waves, adds refresher and turnover burden, and separates one-time transition cost from recurring competence maintenance.

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A

Maritime Tool

Alternative Marine Fuel Comparison Calculator

Compare VLSFO, MGO, LNG, methanol, ammonia, hydrogen, HVO and custom marine fuels on the same delivered-energy basis. See the fuel mass, tank-volume, emissions, annual-cost and investment consequences before treating a lower price per tonne as a better fuel.

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A

Maritime Tool

Alternative-Fuel Engine Retrofit, Fuel-System Integration, Tank Space & Payback Tool

Screen whether an existing ship can realistically convert to a lower-carbon or alternative marine fuel. Preserve the vessel's annual useful propulsion-energy requirement, translate it into alternative-fuel mass, size the endurance tank footprint, test non-revenue-space fit, and compare annual fuel economics against retrofit CAPEX. Advanced mode compares multiple fuel concepts with pilot fuel, lifecycle GHG, displaced cargo value, NPV, break-even fuel price and integration readiness.

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A

Maritime Tool

Ammonia Bunkering Transfer, Toxic Release, Ventilation, ESD/ERS & Safety Zone Tool

Turn an ammonia bunker plan into a fast transfer-safety screen, then use Advanced for line hydraulics, hose pressure, ESD/ERS residual release, vapour-equivalent source, ventilation dilution, detector actions, toxic-area clearance, bunkering time and retrofit cost. Dispersion distances must come from approved project analysis, not this calculator.

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A

Maritime Tool

Ammonia Dual-Fuel Consumption, Pilot Fuel & Tank Sizing Tool

Estimate ammonia and pilot-fuel consumption from engine output energy, brake thermal efficiency and the pilot-energy share you enter. The calculator keeps chemical energy, fuel mass and storage volume separate so a 5% pilot energy share is not mistakenly treated as 5% of fuel mass.

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A

Maritime Tool

Anchor Handling Winch Pull, Brake Holding, Drum Capacity & Emergency Release Tool

Screen an offshore anchor-handling winch at the drum layer where the operation actually occurs. Compare line demand with layer-adjusted pull and brake capacity, calculate usable wire storage, visualize pull loss as the drum fills, check emergency-release load margin, and in Advanced mode build operational load cases, drive-power duty, stored elastic energy, payout duty and 2026 SOLAS readiness.

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A

Maritime Tool

Anchor Scope & Catenary Tool Holding Power, Chain Length, Swing Circle & Drag Risk

Screen an anchored vessel using more than a simple scope ratio. Simple mode calculates static all-chain catenary geometry under a specified horizontal load, identifies seabed contact versus full suspension, estimates anchor/fairlead loads, holding factor and swing radius. Advanced adds wind/current force buildup, anchor/soil derating, optional chain-on-seabed friction, chain and deck-holding-device utilization, reverse chain-length planning and multiple environmental scenarios.

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A

Maritime Tool

Anchor Windlass Pull, Chain Load, Brake Holding & Motor Power Sizing Tool

Turn chain diameter, grade, anchorage depth and certified chain breaking load into the windlass loads that matter. Calculate IACS UR A3 continuous pull, deep-water correction, short-term breakout pull, brake holding load, chain-stopper / foundation load path, wildcat torque and minimum prime-mover power. Advanced mode adds a physical anchor-and-chain lift cross-check, custom class factors, electric or hydraulic drive sizing, recovery time and vendor-candidate comparison.

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Maritime Tool

Ballast Pumping Time, Energy & Port Cost 

Estimate how long a ballast transfer takes, how much electrical energy it consumes and what the operation costs while alongside. The model treats pump capacity, piping limits and ballast-water-management-system throughput as separate bottlenecks instead of assuming nameplate pump flow reaches the tanks.

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Maritime Tool

Ballast Water Exchange & Treatment Planning Tool

Build a tank-by-tank ballast-water plan without mixing up D-1 exchange volume with D-2 treatment throughput. Simple mode estimates exchange or treatment time and checks the D-1 location criteria. Advanced combines D-1 pumping-through, D-1 sequential exchange and D-2 treatment in one tank register, then screens ballast-pump capacity, BWMS treatment capacity, operating envelope, hold time and voyage execution.

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B

Maritime Tool

Ballast Water Treatment System Cost Tool

Estimate the cash and economic cost of installing and operating a ballast water management system. Simple mode gives a fast installed-project and lifecycle-cost screen. Advanced mode sizes treatment capacity, builds retrofit CAPEX, models energy, chemicals, service and off-hire, and shows the levelized cost per treated cubic meter.

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Maritime Tool

Ballast Water TRO, Neutralization, Holding Time & Treatment Compliance Tool

Screen an active-substance ballast-water operation from uptake to discharge. Compare treatment flow and TRO against installed-system limits, model TRO decay during tank holding, estimate neutralization demand, test dosing-pump and chemical inventory capacity, and keep chemical-discharge screening separate from actual D-2 biological compliance.

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Maritime Tool

Bollard Pull Calculator: Tow Resistance, Tug Requirement & Towing Gear Capacity Tool | ShipUniverse

Estimate environmental and tow resistance, convert certified static bollard pull into useful operating pull, determine tug requirement and screen towline, chock, shipboard fitting and tug load-path capacity. Simple mode gives the core answer fast. Advanced adds directional wind/current loads, shallow-water effects, individual tug derating, local port requirements, towing gear and sensitivity analysis.

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Maritime Tool

Bow & Stern Thruster Sizing, Windage, Thrust, Power & Tunnel Capacity Tool

Turn a berth-maneuvering crosswind into required side thrust, split it between bow and stern, estimate static tunnel jet velocity and shaft power, and test the installed thrust and power package. Advanced mode adds transverse current, force and yaw-moment balance about CG, separate bow/stern lever arms, installation and forward-speed losses, detailed tunnel screening and generator reserve.

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B

Maritime Tool

Bulk Carrier Cargo Liquefaction, TML & Moisture Margin Tool

Screen whether cargo that may liquefy or undergo dynamic separation is below its certified Transportable Moisture Limit, whether TML and moisture tests remain current, whether rain or cargo variability invalidates the loading basis, and which individual hold or parcel controls the decision.

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Maritime Tool

Bunker Quantity & Bunker Survey Calculator

Convert observed bunker volume to standard volume and commercial tonnes, compare surveyed quantity with the Bunker Delivery Note, and quantify any variance. Simple mode handles one received parcel quickly. Advanced adds tank-by-tank before/after gauging, individual temperatures and densities, manual VCF overrides, free-water deductions, operational adjustments, MFM and supplier-outturn cross-checks, sensitivity analysis and survey-readiness diagnostics.

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Maritime Tool

Bunker ROB, Range & Endurance Calculator

Turn remaining-on-board fuel into a practical voyage fuel position. Calculate safe steaming endurance, maximum range, voyage consumption, arrival ROB and minimum bunker uplift while protecting the reserve you choose. Advanced mode tracks multiple liquid fuel grades separately, keeps unpumpable fuel outside the usable reserve, identifies the limiting grade and stress-tests weather, adverse current and port delay.

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B

Maritime Tool

Buy vs Charter vs Lease a Ship Calculator

Compare three ways to secure vessel capacity on the same planning horizon. Measure present-value cost, annual equivalent cost, cost per required vessel day, upfront capital, financing exposure, residual value, break-even hire rates and the assumptions most likely to flip the decision.

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C

Maritime Tool

Cargo Hold Ventilation & Sweat Risk Tool

Turn cargo-hold and weather readings into a defensible ventilation decision. Simple mode compares outside and hold dew points or applies the Three Degree Rule while separately screening ship sweat and cargo sweat. Advanced evaluates multiple holds, cargo profiles, steel and cargo temperatures, ventilation capacity, cargo-specific instructions and live ventilation windows without overriding the applicable IMSBC schedule, shipper instruction, fumigation requirement or vessel procedure.

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C

Maritime Tool

Cargo Hold Ventilation, Dew Point & Sweat Risk Tool

Screen cargo-hold condensation risk using measured air temperature, relative humidity, cargo-surface temperature and steel temperature. The tool keeps current cargo sweat, current ship sweat and the effect of introducing outside air separate, then compares the Dew Point Rule and Three Degree Rule without pretending they are interchangeable for every cargo.

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C

Maritime Tool

Cargo Securing & Lashing MSL, Sliding & Tipping Calculator

Screen non-standardized cargo securing from certified lashing strength through directional sliding and tipping resistance. Simple mode answers the fast securing-capacity question. Advanced resolves weak-link MSL, individual lashing groups, angles, friction, port/starboard and fore/aft capacity, tipping moments, corrective lashings and Cargo Securing Manual readiness.

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C

Maritime Tool

Cargo Tank Gas-Freeing & Ventilation Time Tool

Plan the atmospheric transition from hydrocarbon-rich or inert cargo-tank conditions to a measured gas-free state. Simple mode models the two-stage inert-gas purge and air-ventilation sequence. Advanced adds multiple tanks, sequential or parallel ventilation, fan availability, non-IG tanker outlet-velocity screening, 30% LFL deck-level transition and tank-by-tank atmosphere targets.

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C

Maritime Tool

Container Lashing & Stack Load Tool

Screen a deck-container stack using actual container weights and ship-specific securing limits. Simple mode checks total stack compression and transverse securing demand. Advanced works tier by tier, carrying the weight and inertia of every container above each interface and comparing those demands with user-entered CSM/class limits for vertical compression, twistlock shear/tension and lashing-rod capacity.

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C

Maritime Tool

Container Ship Break-Even Freight Rate & Slot Revenue Calculator

Convert vessel and voyage costs into the all-in freight rate and paying utilization required to break even or reach a target margin. Advanced mode separates outbound and inbound cargo economics, empty repositioning, bunker and carbon cost, fixed route charges and annual round-trip performance.

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C

Maritime Tool

Container VGM Tool: Verified Gross Mass & Payload Check

Calculate a packed container’s Verified Gross Mass, compare it with the CSC maximum operating gross mass, check payload headroom, and reconcile declared or terminal-reweighed values. Simple mode handles one container quickly. Advanced supports itemized Method 2 mass, Method 1 direct weighing, tare, pallets/packing/dunnage/securing, attached equipment, measurement uncertainty, terminal reweighs, shipment companion containers and compliance-readiness checks.

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C

Maritime Tool

CPA / TCPA Tool: Closest Point of Approach & Relative Motion

Calculate closest point of approach and time to CPA from true-motion vectors. Simple mode solves one target from own-ship course/speed plus target bearing/range/course/speed. Advanced adds multiple targets, user-defined CPA/TCPA guard limits, bow-crossing range/time, relative-bearing rate, passing side, trial own-ship course/speed, a radar-style relative-motion plot and a trial-manoeuvre sensitivity matrix.

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C

Maritime Tool

Crude-Oil VOC Vapour Recovery, Compressor Capacity & Emissions-Capture ROI Tool

Estimate crude-oil loading vapour generation, normalize vapour flow, screen recovery-system capacity, calculate indicative compressor power, quantify VOC capture and recovered hydrocarbon, and test whether the installed package creates a credible annual operating and investment case.

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C

Maritime Tool

Cruise Ship Food Waste Cost & Digester ROI Calculator

Estimate cruise food-waste generation, digester capacity, landed-waste reduction, utility and labor effects, annual operating value and lifecycle ROI. Advanced mode separates passenger, crew and galley waste, port-disposal routing, power source, cold-storage relief and full retrofit CAPEX.

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C

Maritime Tool

Cruise Ship Freshwater Production & Desalination Cost Tool

Estimate whether onboard freshwater production can cover cruise-hotel demand, how much water must be bunkered or supplied ashore, and what the resulting energy and operating cost looks like. Advanced mode dispatches multiple desalination units by marginal production cost, tests N-1 capacity and shows how long stored potable water can bridge a production outage.

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C

Maritime Tool

Cruise Ship Fuel Consumption & Bunker Cost Tool

Estimate annual cruise-ship fuel consumption, bunker spend, CO₂ emissions and passenger-day economics from sea and port operating profiles. Advanced mode separates primary and secondary fuels, shore-power fuel reduction, anchorage/tender operations, bunkering fees, carbon value, multi-year price escalation and downside stress cases.

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C

Maritime Tool

Cruise Ship Galley Electrical Load, Steam & Peak Demand Tool

Screen cruise-galley peak utility demand without treating connected kW as operating demand. Simple mode converts connected electrical and steam ratings into peak loads and capacity margins. Advanced mode adds individual galley equipment groups, normal versus meal-service diversity, electric steam generation, reserve targets, daily electricity/steam use and utility intensity per meal.

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C

Maritime Tool

Cruise Ship Hotel Load, Peak Power & Battery Peak-Shaving Tool

Screen whether a battery can absorb short cruise-hotel load peaks without confusing power capacity with energy capacity. Simple mode checks one representative peak event. Advanced mode dispatches the battery sequentially through an ordered daily hotel-load profile, tracks SOC, recharge headroom, equivalent cycles and the economic value of moving energy from expensive peak periods into lower-cost recharge windows.

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Maritime Tool

Cruise Ship HVAC Energy & Fuel Savings Calculator

Screen cruise HVAC efficiency projects using hotel-load demand, chillers, ventilation fans, pumps, controls, onboard generator fuel and shore-power tariffs. Advanced mode separates major HVAC loads, climate exposure, retrofit performance, CAPEX and lifecycle cash flow.

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Maritime Tool

Cruise Ship Laundry Water, Steam & Energy Cost Tool

Turn daily laundry mass into water, steam, electricity and hotel-load cost. Simple mode screens one blended laundry stream. Advanced mode separates guest linen, towels, crew/service laundry and other streams, then adds water reuse, heat recovery, steam-heating efficiency, dryer/ironer energy, peak concurrency and wastewater cost.

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C

Maritime Tool

Cruise Ship Shore Power Cost & Savings Calculator

Compare cruise-ship shore power with onboard generation at berth using the loads that actually dominate a cruise call: hotel services, HVAC/chillers, galleys/laundry/refrigeration, pumps and other auxiliaries. Screen electricity and demand charges, generator fuel avoided, annual connected-call savings, CO₂e reduction, retrofit payback, NPV, break-even electricity price and utilization risk.

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Maritime Tool

Cruise Ship Wastewater Treatment Capacity & Cost Calculator

Size a cruise-ship sewage and greywater treatment plant from people onboard and wastewater streams, test peak hydraulic capacity and holding-tank endurance, then estimate electricity, chemical, sludge, shore-reception and lifecycle treatment cost. Advanced mode separates individual wastewater streams, plant availability, peak-hour flow, storage, utility sources and retrofit economics.

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D

Maritime Tool

Dry Bulk Cargo Hold Cleaning Time, Water & Cost Tool

Convert hold area and cleaning productivity into team-hours, water demand and direct cleaning cost. Advanced mode builds the cleaning scope by hold group, then schedules parallel cleaning teams, freshwater rinse, chemicals, washwater/slops handling, drying, expected re-cleaning and the portion of cleaning time that sits on the vessel's commercial critical path.

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D

Maritime Tool

Drydock Critical Period & Docking Stability Tool

Screen the loss of transverse stability as buoyant support transfers to the docking blocks. Simple mode starts from an entered block reaction. Advanced can derive reaction from trim/MCTC or buoyancy loss/TPC, applies free-surface moments, uses a reduced-displacement KM, estimates residual GM and heel under an external moment, and checks critical/final block-bearing pressure against the docking-plan basis.

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E

Maritime Tool

EEOI Tool Energy Efficiency Operational Indicator & Voyage Carbon Intensity

Calculate operational CO₂ efficiency as emissions per unit of transport work using the IMO EEOI method. Simple mode handles one transport voyage with up to two fuels. Advanced supports transport, ballast and other zero-work legs, up to three fuels per row, official EEOI fuel conversion factors plus a custom factor, weighted period EEOI, rolling weighted EEOI, emissions-by-fuel analysis and fuel/work sensitivity without incorrectly averaging individual voyage EEOIs.

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E

Maritime Tool

Emergency Towing Arrangement, Towline Tension, Chock SWL & Tug Bollard Pull Tool

Screen an emergency tow from steady resistance through dynamic line tension, towing-gear weak link and available tug force, then use Advanced for environmental resistance, statutory ETA strength, deployment, multiple scenarios, pennant/chafing checks and Emergency Towing Booklet readiness.

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E

Maritime Tool

Enclosed Space Ventilation, Gas-Freeing, Detector & Rescue Readiness Tool

Estimate theoretical ventilation time, screen the actual pre-entry atmosphere against current IMO recommendations, verify permit and control readiness, and use Advanced to model multiple spaces, detector sampling, gas-freeing, rescue breathing-air endurance and retrieval capacity. No calculator result authorizes enclosed-space entry.

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E

Maritime Tool

Engine Room Bilge & Oily Water Capacity Tool

Model engine-room oily bilge water as an inventory-and-treatment problem instead of a single separator rating. Simple mode checks generation, holding-tank endurance and planned OWS capacity. Advanced adds source-by-source bilge and sludge generation, multiple tanks, multiple oily-water separators, 15 ppm alarm/automatic-stop readiness, N-1 capacity, voyage operating legs, shore reception and separated-oil residue into the sludge system.

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E

Maritime Tool

EU ETS + FuelEU Voyage Cost Calculator

Estimate voyage-attributed EU ETS allowance exposure and FuelEU Maritime compliance economics. Simple mode converts one fuel and voyage scope into ETS cost, FuelEU GHG intensity gap and a voyage-equivalent penalty proxy. Advanced mode separates multiple fuels across intra-EU, extra-EU and EU-port consumption, applies RFNBO reward treatment, annual compliance adjustments, borrowing eligibility and scenario sensitivity.

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F

Maritime Tool

Fixed CO₂ Fire-Extinguishing Cylinder Quantity, Flooding Concentration & Release Time Tool

Screen required free-gas quantity, cylinder count, verified bank charge and release-time capability, then use Advanced for multiple protected spaces, selector and sealing readiness, alarms, maintenance, hydrostatic testing and service planning.

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F

Maritime Tool

Fresh Water Allowance & Dock Water Allowance Tool FWA, DWA & Loading Draft

Calculate the permitted fresh/dock-water load-line allowance, maximum loading draft and projected seawater draft from water density and the vessel’s certified FWA. Advanced mode cross-checks certificate FWA against the Load Lines hydrostatic formula, handles seasonal load-line selection, density uncertainty and separately screens the river/inland consumables allowance permitted before reaching sea.

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F

Maritime Tool

FuelEU Maritime Pooling, Banking & Borrowing Strategy Tool

Route verified FuelEU GHG-intensity compliance balances across pooling, future banking and current-period borrowing. Test vessel-level borrowing caps, prevent pool and borrowing conflicts, preserve a positive pool balance, quantify next-year borrowing debt, and compare strategies before committing a fleet allocation.

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F

Maritime Tool

FuelEU Maritime Pooling, Banking & Borrowing Strategy Tool

Plan FuelEU Maritime flexibility without mixing mechanisms that cannot legally be combined. Simple mode screens a proposed pool plus separate borrowing case. Advanced mode allocates prior banked surplus ship by ship, builds a valid positive pool only where a deficit can be fully cured, applies borrowing only to non-pooled eligible ships, and shows the 1.1× next-year deduction.

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F

Maritime Tool

FuelEU Methane Slip Measurement ROI, Engine-Load Monitoring & Actual Cslip Value Tool

Test whether replacing the FuelEU Annex II LNG methane-slip default with a verified actual Cslip is financially worthwhile. Compare default and actual well-to-wake intensity, FuelEU compliance balance and penalty exposure, EU ETS methane allowance value, measurement and engine-load-monitoring cost, risk-adjusted payback and the Cslip improvement needed to justify the project.

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G

Maritime Tool

GMDSS Reserve Battery Tool Radio Load, Capacity, Charger & Emergency Endurance

Size and screen the GMDSS reserve battery from the actual radio load instead of relying only on nameplate amp-hours. Simple mode converts receive/transmit duty into reserve current, applies the 1-hour or 6-hour SOLAS basis, rapid-discharge capacity effects, battery condition and charger recovery. Advanced builds a full reserve-bus load register, handles simultaneous versus alternative radio paths, checks current-condition endurance, life-cycle sizing, charger recovery, peak-current cable voltage drop and multiple reserve scenarios.

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G

Maritime Tool

Grain Stability Tool Grain Heeling Moment, Residual Area & Allowable KG

Cross-check bulk-grain stability against the International Grain Code using actual grain-shift heeling moment, righting-arm data and free-surface correction. Simple mode screens heel, residual area and corrected GM from a compact GZ curve. Advanced builds the grain moment from compartment VHM data, applies the correct vertical-shift treatment, generates GZ from KN and effective KG, numerically solves equilibrium heel and residual area, and reverse-solves the maximum allowable KG and required GM for the entered grain-loading condition.

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G

Maritime Tool

Great Circle & Rhumb Line Tool Distance, Course, Waypoints & ETA

Compare the shortest great-circle route with a constant-course rhumb line, generate passage waypoints and estimate arrival time. Simple mode compares both routes between two positions. Advanced becomes a multi-leg voyage geometry model with per-leg great-circle/rhumb selection, via points, generated sub-waypoints, speed overrides, STW/current course-to-steer screening, weather speed factor, schedule margin, stop delays, antimeridian handling and latitude-limit review.

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G

Maritime Tool

Gyro & Compass Error Tool True, Magnetic, Compass & Bearing Correction

Convert courses, headings and bearings among True, Magnetic, Compass and Gyro references using an explicit east-positive / west-negative convention. Simple mode gives a fast four-reference conversion and relative-bearing correction. Advanced updates chart variation by annual change, derives gyro error and magnetic-compass deviation from multiple known-bearing observations, interpolates a deviation card by heading, compares manual and observed error sources, and builds a bridge correction ledger with scatter and outlier diagnostics.

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H

Maritime Tool

Hatch Cover Ultrasonic Tightness, Seal Repair & Wet-Cargo Claim Exposure Tool

Turn hatch-cover ultrasonic readings into a tighter owner/operator decision. Screen the worst reading against the accepted test threshold, quantify affected sealing perimeter, check gasket compression, map leak locations, price corrective work and retesting, and compare the repair budget with user-entered wet-cargo claim exposure.

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H

Maritime Tool

Holtrop-Mennen Ship Resistance & Power Tool Calm-Water Resistance & Speed Curve

Estimate calm-water resistance by decomposing the hull into the Holtrop-Mennen resistance components rather than fitting a generic cubic power curve. Simple mode provides a quick bare-hull preliminary-design screen from principal dimensions. Advanced exposes the geometry and empirical terms, appendage register, bulb/transom effects, bow-thruster tunnel drag, historical regression-domain checks, speed-by-speed resistance decomposition and a transparent effective-to-brake power chain.

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H

Maritime Tool

Hull Cleaning ROI & Fuel Savings Estimator

Turn measured hull-performance deterioration into a cleaning decision. Estimate immediate and cycle-average fuel recovery, annual bunker savings, off-hire and cleaning cost, CO₂ reduction, payback, NPV and IRR. Advanced mode adds fouling regrowth, recurring cleaning cycles, capture/waste cost, coating-risk allowance, carbon value and stress testing.

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H

Maritime Tool

Hull Steel Renewal Weight, Plate, Labor & Drydock

Turn a steel-renewal scope into purchased tonnes, fabrication hours and drydock economic exposure. Simple mode sizes plate weight from area and thickness, adds procurement wastage, fabrication labor, coating/staging and incremental dock days. Advanced mode builds the renewal package member by member with weld length, access complexity, NDT share, coating area, transport, scrap and schedule impact.

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H

Maritime Tool

Hull Steel Wastage, UT Thickness, Renewal Tonnage & Drydock Repair Cost Tool

Turn ultrasonic thickness readings into a practical structural-repair screen. Compare measured steel with the approved renewal thickness, trend corrosion from previous UT data, estimate crop-and-renew steel weight, and use Advanced to build a location-by-location drydock repair scope, cost and schedule.

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I

Maritime Tool

IACS E26/E27 Cyber Readiness Assessment Tool

Screen project readiness for IACS UR E26 Rev.1 and UR E27 Rev.1 without treating a self-assessment score as class approval. Simple mode scores ten high-level readiness domains. Advanced mode separates ship-level E26 control families from E27 supplier/equipment evidence, applicability and survey-readiness artifacts.

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I

Maritime Tool

IMDG Segregation & Stowage Tool Dangerous Goods Compatibility & Separation

Screen packaged dangerous goods against the current IMDG general segregation framework, then layer in subsidiary hazards, user-entered Dangerous Goods List column 16b precedence and stowage-category checks. Simple mode compares one pair. Advanced builds a manifest-style cargo register, analyzes every cargo pair, applies pair-specific DGL overrides, flags unresolved Class 1 / “X” cases, checks Category A–E deck restrictions and produces a compatibility matrix and review ledger.

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I

Maritime Tool

In-Depth CII Rating Tool for Ships

Calculate attained annual operational CII, the required CII for the selected reporting year and the IMO A to E rating using ship type, capacity, annual distance and fuel or verified CO2 data. Advanced mode adds multiple fuels, verified CII adjustments, rating-history context, 2030 outlook and operational stress scenarios.

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I

Maritime Tool

In-Depth EEXI Tool for Ships

Estimate attained EEXI, required EEXI and compliance margin under MARPOL Annex VI. Simple mode handles the core conventional-propulsion screen. Advanced adds verified overrides, correction-factor inputs, separate fuels, power-limitation diagnostics, compliance scenarios and a decision board for technical-file review.

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I

Maritime Tool

Inert Gas System & Tank Oxygen Tool Purging, O₂ Dilution, Blower Capacity & Discharge Rate

Screen tanker inert-gas quality, capacity and tank oxygen in one workflow. Simple mode calculates theoretical purge exchanges and time while checking the 5% inert-gas supply limit, 8% cargo-tank oxygen limit, positive pressure and the 125% discharge-capacity relationship. Advanced adds multiple cargo tanks, sequential or parallel inerting, individual tank pressure, discharge-rate demand, delivery-unit redundancy and a live oxygen-decay curve.

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J

Maritime Tool

Just-in-Time Arrival Fuel & Waiting Cost Optimizer

Compare the current plan of sailing faster and potentially waiting outside port with a constrained Just-in-Time arrival timed to berth, fairway and nautical-service availability. The optimizer separates speed-sensitive propulsion fuel from fixed sea auxiliaries and keeps anchorage fuel, non-fuel waiting exposure and optional carbon value visible.

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L

Maritime Tool

Laytime & Demurrage Calculator

Turn allowed laytime and Statement of Facts data into a transparent commercial time account. Simple mode settles known countable hours at load and discharge. Advanced mode derives the clock from commencement and completion timestamps, exact excluded or partially counted periods, overlapping exceptions, cargo-rate allowances, reversible or non-reversible treatment, and different counting behavior after laytime expires.

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L

Maritime Tool

LCO₂ Cargo Tank Pressure, Boil-Off, Reliquefaction & Cargo Conditioning Tool

Screen whether liquefied CO₂ remains inside its approved cargo pressure-temperature envelope and whether the installed pressure-control/reliquefaction system can absorb steady heat ingress. Advanced mode adds tank-by-tank limits, pressure accumulation, cargo quality, conditioning and terminal receipt readiness.

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L

Maritime Tool

LNG Cargo Boil-Off & Reliquefaction Tool BOG Rate, Cargo Loss, Fuel Use & Tank Pressure

Model what happens to LNG boil-off during a laden voyage instead of treating BOR as simple cargo loss. The tool separates gross BOG generation from fuel consumption, reliquefaction, GCU destruction, emergency venting and vapor accumulation, then tracks remaining liquid cargo, retained onboard mass, energy recovered as fuel, reliquefaction power and an empirical tank-pressure trend against action and MARVS limits.

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L

Maritime Tool

LNG Carrier Boil-Off Gas & Cargo Loss Tool

Convert entered boil-off rates and voyage conditions into a transparent LNG mass balance. Separate gross natural BOG from gas used as fuel, BOG returned by reliquefaction, controlled destruction/handling and any unresolved excess, then quantify delivered cargo and commercial exposure without pretending that boil-off automatically equals cargo loss.

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L

Maritime Tool

LNG Fuel Gas Supply System Sizing, Pump, Vaporizer & Engine Demand Tool

Turn the ship's actual gas demand into the FGSS quantities that control equipment selection. Calculate design gas flow, usable BOG contribution, liquid LNG pump throughput, pressure reserve, cryogenic pump electrical load and vaporizer / gas-heater duty. Advanced mode adds the full consumer register, N+1 equipment capacity, tank endurance, bunkering time, BOG compression, ship electrical reserve and project economics.

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L

Maritime Tool

Load Line Freeboard & Plimsoll Mark Tool Summer, Winter, Tropical & Fresh Water Drafts

Translate the ship’s assigned Summer load line into the ordinary seasonal and fresh-water marks, visualize the Plimsoll spacing and screen the allowable draft in dock water. Simple mode derives T, S, W, WNA, F and TF plus draft margin. Advanced adds selectable FWA basis, certificate/mark-spacing cross-checks, dock-water loading allowance, planned weight change, density sensitivity and a professional load-line action board.

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M

Maritime Tool

Main Engine Cylinder Power Balance Tool

Turn indicator-card readings into a readable cylinder-balance picture. Simple mode converts IMEP to indicated power and compares Pmax, Pcomp and power across cylinders. Advanced adds maker/trial references, exhaust temperature, fuel index, mechanical-efficiency and shaft-power cross-checks, user-set balance limits, and a cylinder-by-cylinder diagnostic board.

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Maritime Tool

Marine Battery ESS Fire Safety, Ventilation, Detection & Emergency Response Capacity Tool

Build a battery-space safety capacity profile without assuming one universal threshold for every chemistry or installation. Simple mode calculates zone energy density, normal and emergency air changes, fixed-water application density and available cooling-water endurance. Advanced mode compares each battery zone against project, class, vendor or risk-assessment targets and then checks detection, isolation, drainage and emergency-response resources.

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Maritime Tool

Marine Battery Hybrid ROI & Battery Sizing Calculator

Size a marine battery energy storage system for peak shaving, spinning reserve, zero-emission operating windows and hybrid generator optimization. Estimate required MWh and MW, C-rate, annual throughput, fuel and CO₂ savings, replacement timing, CAPEX, payback, NPV and IRR.

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Maritime Tool

Marine Boiler Steam Balance, Burner Fuel & Auxiliary Steam Capacity Tool

Build the ship's auxiliary steam balance from the operating demand instead of boiler nameplate alone. Calculate required steam after distribution loss and design margin, dispatch waste-heat steam first, determine fired-boiler load and burner fuel, check installed steam capacity, and in Advanced mode model all operating modes, electric steam, blowdown, condensate return, burner and fuel-train limits, feedwater pumps, N-1 critical steam and annual operating cost.

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Maritime Tool

Marine CH₄/N₂O Emissions Measurement, CEMS & Engine-Load Monitoring Cost Tool

Estimate non-CO₂ greenhouse-gas exposure from the entered engine duty profile, then size the monitoring program. Simple mode turns one representative engine/source profile into annual CH₄, N₂O and CO₂e plus program cost. Advanced mode compares continuous emissions measurement, engine-load monitoring with measured emission maps, and a targeted hybrid strategy under the IMO's 2026 measurement, ELM and CEMS framework.

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Maritime Tool

Marine Coating Lifecycle, Recoating & Drydock Cost Tool

Turn coating condition and repair timing into a lifecycle cost plan. Simple mode screens spot repair now versus future full recoating and shows how much added drydock time changes the economics. Advanced mode models tanks, hull zones and other coated areas independently, then schedules recurring full recoats, annual inspection/maintenance and shared drydock campaign costs over the selected horizon.

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Maritime Tool

Marine Compressed Air Leak & Compressor Energy Cost Tool

Turn a compressed-air leak estimate or onboard leak survey into wasted compressor power, annual energy loss, generator-fuel equivalent, emissions exposure and repair payback. Advanced mode models the online compressor fleet, individual leak groups and an optional receiver-pressure decay cross-check.

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Maritime Tool

Marine Condition Monitoring Sensor Coverage & Criticality Tool

Measure whether critical machinery failure modes are actually observable early enough to support maintenance decisions. Simple mode focuses on critical-mode coverage, sensor health, data availability and P-F timing margin. Advanced mode evaluates individual machinery failure modes using criticality, expected frequency, monitoring method, detection effectiveness, data quality and review/response timing to expose high-consequence blind spots.

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Maritime Tool

Marine Cooling Water & Heat Exchanger Tool

Screen a marine central cooler from the heat load all the way to seawater flow, plate area, fouling reserve and pump demand. Simple mode sizes the duty and checks installed area. Advanced combines equipment heat loads with multiple cooler units, availability, clean U-value, fouling resistance, seawater-flow capacity, pressure drop and warm-sea sensitivity.

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Maritime Tool

Marine Cylinder Oil Consumption & Cost Tool

Estimate two-stroke cylinder-oil consumption from engine output energy and the feed rate you enter. The tool calculates daily and annual mass, liters, cost and onboard-stock endurance. Advanced mode models multiple load periods with different feed rates and adds procurement lead-time, voyage ROB and sensitivity planning.

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Maritime Tool

Marine DC Grid Retrofit, Converter Capacity, Efficiency & Electrification ROI Tool

Screen a retrofit from conventional AC distribution toward a marine DC grid. Calculate peak DC-bus transfer and current, test converter capacity, compare source-to-load efficiency, quantify avoided generator energy and estimate simple payback. Advanced mode adds source and load conversion shares, bus-section survivability, converter-bank losses, fuel and CO₂ economics, lifecycle NPV and engineering-readiness gates.

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Maritime Tool

Marine Engine Overhaul Cost & Downtime Tool

Build a preliminary engine-overhaul budget without hiding the commercial cost of lost operating time. Simple mode converts total man-hours and available workforce into a downtime screen. Advanced mode schedules work packages by phase, applies shared-workforce constraints, separates inspection-dependent parts from base scope and compares the resulting exposure with an optional engine-replacement case.

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Maritime Tool

Marine Engine Substantial Modification, NOx Tier Re-Certification & Retrofit Cost Tool

Screen whether an installed-engine project stays within routine Technical File maintenance or moves into a Regulation 13 major-conversion / re-certification path. Calculate the speed-dependent Tier limit, quantify the NOx gap and use Advanced for test-cycle weighting, section 7.2 onboard certification, Technical File readiness, retrofit integration and commercial cost.

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Maritime Tool

Marine Exhaust Back Pressure, Silencer & Exhaust Piping Tool

Screen a marine engine exhaust line from turbocharger outlet to funnel. Simple mode keeps the entry burden low and estimates pipe friction, silencer/equipment loss, hot-stack draft, engine back-pressure margin and a pressure-based minimum pipe diameter. Advanced adds operating points, segment-by-segment piping, exhaust-treatment components, fouling factors, acoustic insertion-loss references and load/fouling sensitivity.

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Maritime Tool

Marine Fire Pump & Hydrant Pressure Tool SOLAS Flow, Head, Hose & Emergency Fire Pump

Screen a ship fire-main hydraulically from pump head to the most remote hydrant instead of checking pump capacity alone. Simple mode gives a fast residual-pressure and hose/nozzle result. Advanced adds pump curves, multiple fire-main segments, hose/nozzle branches, SOLAS main-pump capacity screens, the FSS Code emergency-pump capacity rule, NPSH, design-flow pressure checks, operating-point analysis and live hydraulic-grade visuals.

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Maritime Tool

Marine Fuel Cell vs Generator vs Battery Hybrid TCO, Endurance & Power-Sizing Tool

Compare three shipboard power architectures against the same electrical mission: conventional generator-only, fuel-cell plus battery, and generator plus battery hybrid. Size continuous source power, battery kW and kWh, zero-emission endurance, fuel endurance and lifecycle cost. Advanced mode replaces the quick duty estimate with operating-mode rows and full fuel, replacement, shore-power, carbon and safety assumptions.

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Maritime Tool

Marine Fuel Injection & Injector Performance Tool

Screen the hydraulic capacity of a marine injector, compare cylinder combustion indicators and organize injector bench-test results in one place. Simple mode focuses on a fast nozzle/injection-event calculation. Advanced combines nozzle hydraulics, actual fuel demand, cylinder Pmax/Pcomp/EGT/fuel-index patterns, injector leak-off and OEM-specific bench-test limits.

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Maritime Tool

Marine Fuel Oil Purifier Capacity, Throughput, Heating & Sludge Production Tool

Convert daily fuel demand into the flow that must actually be treated, compare it with certified or OEM separator capacity for the real fuel, calculate preheater duty to reach the separation setpoint, estimate sludge generation and identify low-margin operation. Advanced mode adds engine-derived fuel demand, one-unit-out redundancy, viscosity-temperature screening, detailed heater / steam demand, bowl-discharge water, sludge-tank endurance and annual treatment cost.

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Maritime Tool

Marine Heat Exchanger Fouling, Cooling Capacity & Cleaning ROI Tool

Screen whether a marine cooler, condenser or process heat exchanger is losing enough heat-transfer performance to justify cleaning. Simple mode compares clean and current overall heat-transfer coefficients and links the recoverable fouling penalty to cleaning payback. Advanced mode calculates LMTD, measured U, fouling resistance, duty shortfall, post-clean recovery and lifecycle economics across multiple operating conditions.

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Maritime Tool

Marine Heat Exchanger Fouling, Cooling Capacity & Cleaning ROI Tool

Screen whether a marine cooler, condenser or process heat exchanger is losing enough heat-transfer performance to justify cleaning. Simple mode compares clean and current overall heat-transfer coefficients and links the recoverable fouling penalty to cleaning payback. Advanced mode calculates LMTD, measured U, fouling resistance, duty shortfall, post-clean recovery and lifecycle economics across multiple operating conditions.

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Maritime Tool

Marine Lubricating Oil Consumption & Replenishment Tool

Convert engine load, specific oil consumption, measured top-up rates and planned maintenance into a voyage lube-oil stock plan. Simple mode gives a fast power-based consumption and replenishment answer. Advanced separates oil streams, supports four consumption bases, schedules one-time service events, aggregates multiple storage tanks by oil family and calculates reserve, reorder timing, package-rounded order quantities and cost.

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Maritime Tool

Marine Predictive Maintenance Sensor ROI & Failure-Avoidance Tool

Turn condition-monitoring performance into a financial case. Simple mode estimates how many machinery failures can be intercepted early and compares avoided repair/downtime cost against monitoring CAPEX and recurring service cost. Advanced mode builds the ROI from individual failure modes, P-F timing, data quality, sensor health, false alarms, channel cost and fleet scale.

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Maritime Tool

Marine Propeller Shaft Torque, Gearbox, Coupling & Power Margin Tool

Convert shaft power and rpm into the torque carried by the propulsion train. Check hollow-shaft torsional stress, continuous and peak gearbox capacity, coupling torque margin and the weakest power limit. Advanced mode adds prime-mover and reduction-gear reconstruction, IACS UR M68 shaft-diameter screening, torsional-vibration evidence, service-factor checks, operating cases and future uprate analysis.

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Maritime Tool

Marine Refrigeration Load, Compressor Capacity & Cold Room Sizing Tool

Estimate provision-room refrigeration duty from envelope heat gain, moist-air infiltration, product cooling or freezing, lighting, evaporator fans, personnel and defrost. Advanced mode links multiple cold rooms, product batches and compressor units, checks storage volume and N-1 capacity, and exposes the conditions most likely to push the plant beyond its available cooling margin.

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Maritime Tool

Marine Retrofit Electrical Load, Generator & Switchboard Capacity Tool

Test whether a new shipboard retrofit can fit inside the existing electrical plant. Model generator headroom, reserve requirement, transformer loading, switchboard current, power factor, starting-current exposure and the minimum equipment ratings needed when the retrofit pushes the vessel beyond existing capacity.

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Maritime Tool

Marine Retrofit Electrical Load, Generator & Switchboard Capacity Tool

Screen whether a new shipboard electrical retrofit fits the existing generating plant and main switchboard before detailed design. Simple mode converts the retrofit's connected kW into realistic demand kW and added current. Advanced mode adds individual loads, power factor, start/inrush events, load shedding, N-1 generator margin, emergency-generator impact and short-circuit withstand checks.

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Maritime Tool

Marine Retrofit ROI Calculator

Turn a retrofit idea into a transparent investment screen. Quantify fuel savings, other recurring benefits, added operating cost, installation/off-hire exposure, simple and discounted payback, NPV, IRR and the minimum savings needed to justify the project. Advanced mode adds detailed CAPEX and benefit registers, performance degradation, escalation, financing context, annual cash flows and sensitivity analysis.

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Maritime Tool

Marine SCR Urea Consumption & NOx Cost Calculator

Estimate NOx mass entering an SCR system, NOx removed, urea-solution demand, storage endurance and annual compliance cost. Advanced mode separates engine operating segments, Tier-reference limits, dosing reserve, energy/fuel penalty, catalyst replacement and lifecycle cost.

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Maritime Tool

Marine Sewage Treatment Plant Capacity & Holding Tank Tool

Screen shipboard sewage treatment capacity as a hydraulic, organic-load and storage problem. Simple mode compares onboard generation, effective STP capacity and holding endurance. Advanced mode adds source registers, multiple sewage treatment plants, untreated and treated-effluent tanks, voyage restrictions, Baltic passenger-ship nutrient-capable treatment, shore reception, N-1 resilience and sensitivity analysis.

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Maritime Tool

Marine Spare Parts Inventory & Stockout Cost Tool

Screen whether a spare-parts position is likely to cover demand during supplier lead time and what an availability gap could cost. The model separates normal part value from the incremental economic penalty of expediting and operational downtime, then shows the working-capital tradeoff behind higher service levels.

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Maritime Tool

Marine Swappable Battery Container Sizing, Swap Time & Port Inventory Tool

Size a swappable battery-container set for the vessel, estimate physical exchange time and determine how many containers are tied up ashore while recharging. Advanced mode separates SOC window, battery SOH, discharge/charge efficiency, swap positions, charger count, grid limit and charged-ready buffer so port inventory and recharge throughput are checked against the vessel service schedule.

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Maritime Tool

Marine Turbocharger Performance, Scavenge Air & Surge Margin Tool

Screen the complete air path from turbocharger inlet to scavenge receiver. Simple mode checks pressure ratio, compressor efficiency, surge distance, charge-air cooling and turbo speed. Advanced mode plots multiple operating points against a user-entered OEM surge line, separates auxiliary-blower flow, calculates corrected map coordinates, estimates charge-air condensate, and exposes weak load points, cooler losses and sensitivity to falling air flow or rising pressure ratio.

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Maritime Tool

Marine VFD Pump & Fan Energy Savings ROI Tool

Estimate the energy and commercial value of reducing centrifugal pump or fan speed with a variable frequency drive. The model starts from measured or estimated baseline electrical kW, then applies an entered speed-power relationship and VFD efficiency instead of assuming that every marine auxiliary automatically follows the ideal cube law.

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Maritime Tool

Marine Waste Heat Recovery ROI & Power Savings Calculator

Screen steam-cycle, ORC, power-turbine and hybrid marine waste heat recovery projects using recoverable thermal energy, conversion losses, parasitic demand, auxiliary-generator fuel displacement, engine-side penalties and full retrofit economics.

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Maritime Tool

MASS Remote Operations Centre Connectivity & Resilience Tool

Screen whether a Remote Operations Centre has enough communications capacity and quality for the remotely supported fleet. Simple compares full-fleet demand with primary and backup paths. Advanced adds multiple vessel groups and multiple network paths, then tests normal qualified capacity, immediate failover, restored single-path N-1 capacity and common-mode shared-risk-group outages.

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Maritime Tool

Methanol Bunkering Transfer Rate, Hose Pressure Drop, ESD/ERS & Bunkering Time Tool

Screen a planned methanol bunker transfer in seconds. Simple mode checks quantity, receiving capacity, requested rate, hose velocity, Darcy pressure loss, pump-pressure margin, hose pressure rating, post-ESD continued transfer and total pumping time. Advanced adds the full transfer route, tank high-high buffer, hose test relationships, vapour return, ESD sequence, ERS spill exposure and operational readiness.

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Maritime Tool

Methanol Fuel Tank Sizing, Range & Cargo Space 

Estimate NOx mass entering an SCR system, NOx removed, urea-solution demand, storage endurance and annual compliance cost. Advanced mode separates engine operating segments, Tier-reference limits, dosing reserve, energy/fuel penalty, catalyst replacement and lifecycle cost.

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Maritime Tool

Mooring Line Load & Winch Brake Tool Wind, Current, Line Tension, MBL & Brake Render

Estimate berth environmental loads and see how the mooring system actually shares them. Simple mode gives a fast surge/sway group-load screen. Advanced solves individual line tensions from fairlead-to-bollard geometry, line stiffness and pretension, then compares every line against its IMO operational WLL, Ship Design MBL / LDBF relationship and winch brake-render setting while showing the arrangement live on a berth plan.

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Maritime Tool

Mooring Line MBL, Tension & Recoil Energy Calculator

Screen a mooring line against Ship Design MBL, installed Line Design Break Force and working-load limits. Estimate dynamic peak tension, effective strength after user-entered retention factors, elastic stretch, stored strain energy and optional tail contribution. Advanced mode adds winch/fitting checks, retention losses, scenario stress and tension-energy sensitivity.

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Maritime Tool

Mooring Winch Brake Rendering, Drum Layer & Brake Test Tool

Screen the mooring winch as the intended weak link. Compare the verified brake setting with the MEG4 Ship Design MBL basis, calculate drum-layer force loss, convert hydraulic jack pressure into brake torque and line pull, and manage periodic or post-maintenance testing across the mooring deck.

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Maritime Tool

Naval Additive Manufacturing Spare-Part Buy-vs-Print & Lead-Time Tool

Compare procurement and additive-manufacturing response for a naval spare without assuming that a printable geometry is automatically approved for service. Simple mode screens cash cost, lead time and mission-delay exposure. Advanced mode adds approved stock, qualification status, print yield, machine queue, post-processing/NDE, bridge-part replacement, recurring demand and lifecycle supply economics.

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Maritime Tool

Naval Chilled Water Plant Load, Cooling Margin & Redundancy Tool

Screen whether a shipboard chilled-water plant can carry the coincident cooling load, preserve the entered reserve target, survive loss of the largest available chiller and still circulate the required chilled-water flow. Advanced mode separates critical and shedable loads, multiple chiller groups, pump redundancy, fluid properties and estimated plant electrical demand.

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Maritime Tool

Naval Dry Dock Capacity & Fleet Availability Calculator

Screen whether the available dry-dock base can absorb recurring fleet maintenance demand, quantify capacity gaps and backlog growth, and translate docking plus queue exposure into a fleet-availability planning view. Advanced mode separates demand and capacity by dock class and projects backlog over multiple years.

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Maritime Tool

Naval Ship Electrical Load, Power Margin & Generator Redundancy Tool

Screen whether ship-service generation can carry the intended electrical load with usable operating margin and credible generator redundancy. Simple mode separates normal online reserve, largest-step reserve and N-1 capacity. Advanced mode models generator groups and load groups by bus section, essential post-casualty demand, automatic load shedding and short-duration fast reserve.

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Maritime Tool

Naval Ship Lifecycle Cost Calculator

Build a fleet-level lifecycle cost profile from acquisition through decades of operating and support spending, planned depot availabilities, modernization waves, digital sustainment and end-of-service costs. Simple mode gives a fast program screen. Advanced mode creates a year-by-year lifecycle schedule, present-value cost stack, availability burden, stress cases and cost-driver sensitivity.

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Maritime Tool

Naval Ship Maintenance Delay & Availability Cost Calculator

Turn maintenance overruns into a fleet-readiness and cost picture. Quantify direct delay cost, lost available ship-days, average ships available, requirement margin, schedule-cascade exposure and the economics of accelerating recovery. Advanced mode adds repeated availabilities, detailed cost drivers, recovery options and delay-sensitivity analysis.

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Maritime Tool

Naval Shipyard Workforce, Man-Day & Maintenance Throughput Tool

Convert planned maintenance workload into effective shipyard throughput and a labor-bound completion forecast. Simple mode screens one blended workforce. Advanced mode separates trade capacity from maintenance work packages, then shows which skill group, workfront or non-labor schedule floor controls the maintenance duration.

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Maritime Tool

Off-Spec Bunker Fuel Claim & De-Bunkering Cost Tool

Build a commercial exposure ledger without pretending the calculator can decide legal recoverability. Simple mode sizes the affected invoice, expected supplier credit, removal/disposal cost, replacement-price delta, salvage, delay exposure and fixed claim costs. Advanced mode adds multiple affected parcels/tanks plus de-bunkering transfer time, receiving spread, replacement delay, fuel testing, machinery remediation and settlement sensitivity.

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Maritime Tool

Offshore Wind Installation Vessel Cost & Weather Downtime Tool

Convert turbine count, installation cycle time and weather operability into WTIV vessel-days, standby exposure, support-vessel demand, fuel use, campaign duration and marine installation cost. Advanced mode separates offshore phases, vessel fleets, loadout strategy and class-specific weather productivity.

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Maritime Tool

Onboard Carbon Capture ROI & Storage Capacity Calculator

Screen onboard carbon capture economics from exhaust generation through capture, energy penalty, liquefied CO2 storage, offloading and permanent-storage logistics. Simple mode gives a fast vessel-level case. Advanced mode separates exhaust sources, capture availability, heat and electrical penalties, tank sizing, terminal costs, lifecycle cash flow and carbon-value sensitivity.

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Maritime Tool

PCTC / Ro-Ro EV Fire Detection & Thermal Runaway Risk Tool

Answer the practical shipboard question: how prepared is this vehicle deck to detect, locate and control an EV or conventional vehicle fire before escalation? Simple mode gives a fast readiness screen. Advanced adds deck-by-deck detection layers, response timing, water balance, isolation, PPE, thermal monitoring and regulatory applicability.

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Maritime Tool

Pilot Ladder & Pilot Transfer Arrangement SOLAS Compliance Tool

Screen current pilot-transfer arrangements against the SOLAS V/23 framework and the IMO recommendation in force in 2026, while separately showing readiness for the mandatory 2028 performance standards. Simple mode gives a fast pre-transfer check. Advanced verifies dimensional geometry, combination arrangements, deck access, securing, associated equipment, ladder condition, winch-reel controls and the major 2028 lifecycle changes without mixing future requirements into today’s compliance result.

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Maritime Tool

Port Call Cost & Disbursement Account Tool

Build a fast proforma disbursement account, estimate advance funding and expected final DA, or use Advanced to model each port charge by quantity, tariff basis, tax, exchange rate and final invoice value. Reconcile PDA to FDA, separate owner/charterer/recoverable exposure, and stress port-stay and final-cost variance before approving funding.

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Maritime Tool

Port Congestion Delay Cost Calculator

Convert port congestion into vessel-time, bunker, port, cargo and schedule exposure. Use Simple for a fast delay-cost screen, or Advanced to separate anchorage, berth queue, terminal and other phases, model commercial recovery, allocate cost to cargo units, and stress delay duration against bunker prices.

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Maritime Tool

Port Shore Power Grid, Transformer & Cable Capacity Tool

Screen whether a port shore-power system can carry the simultaneous vessel load from the utility interface through transformers to the final shore-to-ship cable circuits. Simple mode sizes aggregate MW/MVA and per-berth cable capacity. Advanced mode adds berth-by-berth loads, transformer groups, utility-service limits, transformer N-1, cable derating and voltage-drop screening.

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Maritime Tool

Propeller Cavitation, Tip Speed, Pressure Margin & Blade Erosion Risk Tool

Screen a propeller operating point for cavitation-number margin, tip speed, immersion and observed cavitation, then use Advanced to resolve local suction-pressure margin, thrust/blade loading, operating-profile cases, hull-pressure pulses, erosion evidence and repair economics.

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Maritime Tool

Propeller Energy-Saving Device Retrofit Selection, Fuel Savings & ROI Tool

Shortlist the propeller energy-saving technologies most aligned with the vessel's operating profile and dominant hydrodynamic loss, then test the economics using a supplier, CFD, model-test or sea-trial savings assumption. Advanced mode compares candidate devices independently with low/base/high savings, off-hire, CAPEX, CO₂ value, NPV and hydrodynamic-readiness gates.

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Maritime Tool

Propeller Polishing ROI & Fuel Savings Calculator

Turn measured propeller-performance loss into a maintenance decision. Estimate immediate and cycle-average propulsion-fuel recovery, bunker savings, polishing and off-hire cost, CO₂ reduction, payback, NPV and IRR. Advanced mode adds roughness/fouling return, recurring polishing cycles, inspection and underwater-work costs, carbon value, surface-risk allowance and stress testing.

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Maritime Tool

Propeller Slip Tool: Pitch, RPM, Speed & Propeller Efficiency

Calculate propeller theoretical speed, shaft RPM, advance per revolution and geometric slip from pitch and vessel speed. Simple mode answers the core slip question quickly. Advanced adds current-corrected speed through water, propeller diameter, wake fraction, advance ratio, thrust deduction, open-water coefficients or direct efficiency, relative-rotative efficiency, drivetrain losses, thrust/torque estimates and a full propulsive-efficiency chain.

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Maritime Tool

Propulsion Shaft Alignment, Jacking Load, Bearing Load & Stern-Tube Oil-Film Risk Tool

Compare measured jacking with approved shaft-alignment reactions, check bearing unloading and projected pressure, evaluate cold-to-running reaction shifts and relative slope, screen aft-bearing hydrodynamic lubrication, and price a likely alignment or stern-tube intervention.

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Maritime Tool

Reefer Container Power & Fuel Cost Calculator

Estimate reefer electrical demand, voyage energy, auxiliary-generator fuel use, shore-power cost, emissions and cost per reefer-day. Advanced mode separates chilled, frozen and special-cargo reefers, adds ambient-load weighting, energy-management savings, diversified peak demand and the vessel's available reefer-power margin.

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Maritime Tool

Remote Ship Inspection Drone vs Scaffold Cost & Downtime Tool

Compare drone-assisted ship inspection with full scaffold/staging access without assuming the drone replaces every close-up or measurement task. Simple mode compares drone scan + physical follow-up against full scaffold access. Advanced mode adds multiple tanks/holds/structures, drone applicability, follow-up share, staging labor/material, critical-path overlap, data processing, owned-drone program cost and fleet economics.

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Maritime Tool

Remote Ship Inspection Drone vs Scaffold Cost & Downtime Tool

Compare drone-assisted ship inspection with full scaffold/staging access without assuming the drone replaces every close-up or measurement task. Simple mode compares drone scan + physical follow-up against full scaffold access. Advanced mode adds multiple tanks/holds/structures, drone applicability, follow-up share, staging labor/material, critical-path overlap, data processing, owned-drone program cost and fleet economics.

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Maritime Tool

Ro-Ro Ramp SWL, Axle Load & Ramp Gradient Tool

Screen whether a truck, trailer, MAFI, heavy plant or project vehicle can use a ship ramp without exceeding the certified ramp SWL, approved axle/wheel loading or ramp-gradient limits. Simple mode answers the core loading question quickly. Advanced adds impact factors, tyre contact pressure, vehicle geometry, breakover, traction, edge clearance and additional concurrent vehicle groups.

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Maritime Tool

Ro-Ro Vehicle Deck Fire Water Demand, Drainage & Stability Tool

Size the fire-water problem and the drainage/stability problem together. Calculate prescriptive vehicle-deck water demand, installed-pump margin, the 125% drainage screen, standing-water accumulation, free-surface penalty and residual GM, then use Advanced for multiple protected decks, gravity scuppers, finite water endurance, added-water KG, heel, 2026 fire-detection/video readiness and retrofit cost.

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Maritime Tool

S-100 ECDIS Upgrade, Bridge Integration & Crew Transition Cost Tool

Plan an S-100 ECDIS transition without treating 1 January 2029 as a fleetwide retrofit deadline. Screen station upgrades or replacements, bridge integration, testing, commissioning and crew familiarization. Advanced mode separates S-101/S-57 dual-fuel capability, bridge interfaces, optional S-100 data products, class/flag work, training roles, recurring data/service cost and lifecycle fleet budget.

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Maritime Tool

Sea Chest, Strainer & Seawater Pump Performance Tool

Follow the seawater path from hull opening to pump operating point. Simple mode checks pump/system intersection, flow margin and NPSH. Advanced resolves sea-chest entrance velocity, Darcy suction loss, strainer fouling, multiple parallel pump curves, NPSH available, pump power and warm-water/fouling sensitivity in one live model.

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Maritime Tool

Set & Drift Tool Course to Steer, Current Vector & Course Made Good

Solve the current triangle in both directions. Simple mode shows where the vessel will actually go on an entered course through the water, then solves the true course to steer required to make the desired track good. Advanced derives set and drift from observed CTW/STW versus COG/SOG and plans multiple route legs with changing current.

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Maritime Tool

SFOC Tool: Marine Engine Fuel Consumption & Efficiency

Calculate measured specific fuel oil consumption, normalize it to a reference fuel energy basis, compare it with an OEM/shop-trial target and quantify the fuel and cost penalty. Simple mode handles one operating point quickly. Advanced builds a multi-load performance curve with brake-power or generator-output measurement, LCV normalization, thermal efficiency, annual operating profile and load-point diagnostics.

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Maritime Tool

Ship CO₂ Emissions Calculator

Estimate direct shipboard CO₂ from fuel consumption and an editable fuel-specific conversion factor. Simple mode derives voyage emissions from distance, speed and daily burn. Advanced uses actual sea and port fuel quantities by fuel, adds cargo transport-work intensity, annualization, carbon-cost exposure and scenario stress without confusing direct combustion CO₂ with lifecycle greenhouse-gas emissions.

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Maritime Tool

Ship Compressed Air System Capacity Tool

Size and stress-test the ship's low-pressure service and control-air plant. Simple mode checks normal compressor loading, a short-duration peak, receiver pressure drawdown and recovery. Advanced adds individual consumers, compressors, receivers, compressor response delay, N-1 operation, control-air reserve, downstream pressure loss, optional reduced starting-air backup and a time-domain pressure transient.

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Maritime Tool

Ship Drydock Cost Tool

Build a defensible vessel drydock budget without mixing yard spending and lost earnings. Simple mode gives a fast project estimate. Advanced mode develops coating and steel quantities, itemizes additional work packages, exposes critical-path day additions, stress-tests scope growth and schedule overrun, and shows the commercial cost of every extra day in the yard.

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Maritime Tool

Ship Drydock Slot, Off-Hire & Revenue Opportunity Cost Tool

Measure what a drydock really costs once lost trading time is added to the yard invoice. Simple mode converts positioning, waiting, dock and recommissioning days into total economic exposure and shows how many days a slot premium must save to pay for itself. Advanced mode compares multiple yard/slot alternatives using slot-confidence risk, lost-slot delay, overrun probability, deviation fuel, logistics and commercial disruption.

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Maritime Tool

Ship Electronic Inclinometer, Roll Motion, Cargo Shift & Lashing Risk Tool

Convert electronic-inclinometer roll data into an owner/operator risk picture without pretending the inclinometer is approved lashing software. Screen the 2026 carriage requirement, roll-rate and angular-acceleration severity, synchronous/parametric period proximity, motion-derived transverse cargo demand, friction and securing margin.

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Maritime Tool

Ship Emergency Power, UPS & Blackout Endurance Tool

Model the blackout chain instead of only generator kW. Screen the immediate UPS/transitional bridge, emergency-source restoration time, sustained emergency power, energy/fuel endurance and critical load sequence. Advanced mode adds individual emergency loads with different required durations, start/inrush events, emergency-generator fuel calculation, battery-source capacity, priority shedding and blackout-readiness checks.

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Maritime Tool

Ship Emergency Power, UPS & Blackout Endurance Tool

Model the blackout bridge from instantaneous UPS support through emergency-generator pickup, then test steady-state load, reserve margin, motor-start transient capacity, load-restoration steps and fuel-backed endurance. Advanced mode builds the analysis from individual emergency loads and shows which loads should be restored, staggered or shed first.

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Maritime Tool

Ship Engine Room Ventilation, Combustion Air, Heat Load & Fan Sizing Tool

Build the machinery-space air balance from combustion demand and heat rejection, identify whether the ISO heat-evacuation check or the 1.5× combustion-air floor controls, size the final supply airflow and fan power, then test supply and extraction capacity with redundancy, free-area, air-change and retrofit-energy screens.

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Maritime Tool

Ship Fire Pump, Fire Main, Hydrant Pressure & Emergency Pump Capacity Tool

Turn the vessel's approved fire-pump demand and actual fire-main geometry into a hydraulic operating screen. Check minimum pump count and per-pump capacity, farthest-hydrant residual pressure, fire-main velocity and pressure loss, nozzle flow, required pump discharge pressure, emergency-pump capacity and pressure, and in Advanced mode build the route segment by segment, test NPSH and suction conditions, and verify the independence and readiness chain.

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Maritime Tool

Ship Freshwater & RO Capacity Tool

Turn people, service loads, potable-water storage and watermaker capacity into a voyage freshwater plan. Simple mode answers daily demand, RO coverage, reserve endurance and bunker-water requirement. Advanced builds the ship from consumer groups, service loads, potable tanks, RO units and voyage legs, then checks N-1 production, feed/brine flow, product-TDS screening, energy and tank inventory across the voyage.

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Maritime Tool

Ship Fuel Consumption Calculator

Estimate ship fuel consumption from observed daily burn or from engine power and SFOC. Calculate sea and port fuel, bunker requirement, voyage cost, CO₂e, annual spend and stress exposure. Advanced mode separates laden, ballast, auxiliaries, port working and waiting demand.

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Maritime Tool

Ship Fuel Consumption, Voyage Cost & Bunker Requirement Tool

Estimate voyage fuel consumption, sea and port time, bunker cost, departure fuel requirement and bunker uplift. Simple mode answers the core question quickly. Advanced adds speed-power scaling, primary and ECA/secondary fuels, route legs, tank capacity, reserve policy, planned stems and total voyage cash cost.

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Maritime Tool

Ship GM Tool: Metacentric Height & Free Surface Correction

Calculate uncorrected and free-surface-corrected GM, corrected KG, and margin to the vessel’s approved minimum GM. Simple mode gives a fast stability screen from displacement, KM, KG and free-surface effect. Advanced adds slack-tank FSM calculations, added/removed weights, transverse and vertical moments, virtual rise of G, estimated list angle, GM sensitivity and a visual stability dashboard.

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Maritime Tool

Ship HVAC Cooling Load, Chiller Capacity & Airflow Tool

Size and stress-test shipboard accommodation HVAC from the cooling load outward. Simple mode gives a fast summer capacity and airflow screen. Advanced decomposes each zone into transmission, solar, occupants, lighting, equipment, ventilation, infiltration and latent load, then checks chillers, AHUs, N+1 redundancy, chilled-water flow, condenser heat rejection and hot-weather sensitivity.

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Maritime Tool

Ship Loan & Vessel Financing Calculator

Model ship acquisition financing from equity at closing through monthly debt service, total interest, balloon exposure and vessel earnings coverage. Advanced mode adds interest-only periods, detailed acquisition costs, target DSCR, refinance / exit value, stress cases and a full annual debt schedule.

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Maritime Tool

Ship Machinery Failure Downtime, Spare Strategy & Repair Cost Tool

Model what machinery failure really costs after repair materials, labour, economic downtime, sourcing delay, emergency freight and spare inventory are combined. Simple mode compares no dedicated spare with one onboard spare. Advanced mode compares no spare, fleet shore pool and onboard stock across multiple machinery families using lead-time demand and stockout probability.

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Maritime Tool

Ship Recycling Sale Value, Scrap Price, Yard Compliance & Recycle-Now Decision Tool

Convert recycling bids into net owner proceeds, screen the proposed recycling route, compare recycling today with continued trading, and solve the TCE or future scrap price needed to justify waiting. Simple mode gives the owner decision quickly. Advanced adds yard bids, delivery economics, compliance evidence, payment risk, drydock exposure and scenario sensitivity.

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Maritime Tool

Ship Repair Cost & Man-Hour Estimator

Build a repair budget from physical scope and labor intensity instead of one lump-sum guess. Simple mode converts steel, piping, coating and other repair labor into a fast man-hour and cost screen. Advanced mode builds the estimate package by package with complexity, access, rework, overtime, materials, subcontractors, equipment, dock/berth cost, schedule capacity and owner economic exposure.

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Maritime Tool

Ship Satellite Network Addition ROI, Redundancy & Connectivity Value Tool

Screen whether adding a second shipboard satellite network is worth the cost. Estimate how many primary-network outage hours the second path can actually remove after common-mode outages and failover success are considered, then value the avoided downtime plus crew, commercial and operational connectivity gains. Advanced mode adds route coverage, failover events, bandwidth, fleet scaling, lifecycle hardware cost, use-case value rows and cyber/network readiness.

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Maritime Tool

Ship Scrubber ROI Tool

Test whether an exhaust gas cleaning system can earn back its installed cost from the HSFO versus compliant-fuel price spread. Simple mode gives a fast investment screen. Advanced mode adds technical availability, washwater restrictions, installation off-hire, operating penalties, major service, carbon cost on extra fuel, fuel-price escalation and downside scenarios.

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Maritime Tool

Ship Shaft Generator ROI & Fuel Savings Calculator

Screen a shaft-generator retrofit by comparing auxiliary-generator fuel avoided with the incremental main-engine fuel needed to produce electrical power through the PTO efficiency chain. Advanced mode adds operating eligibility, capacity limits, separate fuel and CO2 factors, maintenance displacement, off-hire, lifecycle escalation and downside sensitivity.

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Maritime Tool

Ship Speed vs Fuel Cost Optimizer

Find the speed that minimizes the combined economic cost of fuel and voyage time across an operational speed range. Compare slower and faster sailing against a known vessel fuel point, see the fuel/time trade-off, enforce an arrival-time limit, and in Advanced mode separate propulsion from auxiliary load, calibrate the fuel curve, account for current, hull and weather penalties, and stress-test bunker price and time value.

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Maritime Tool

Ship Steering Gear, Rudder Torque, Hydraulic Power & Pump Capacity Tool

Estimate rudder force and stock torque, convert torque into ram force and hydraulic pressure, calculate cylinder oil volume, main and auxiliary pump flow, motor kW and steering time, compare power-unit packages, and screen SOLAS redundancy and alternative-power triggers.

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Maritime Tool

Ship Steering Gear, Rudder Torque, Hydraulic Power & Pump Capacity Tool

Convert an approved rudder design torque into ram force, hydraulic pressure, pump flow, steering time and hydraulic motor power. Screen the 28-second main-steering requirement, the 60-second auxiliary requirement, power-operated steering triggers and alternative-power requirements. Advanced mode adds a hydrodynamic torque estimate, detailed actuator geometry, individual power-unit capacity, N-1 performance, pressure-envelope checks, auxiliary steering and emergency-source endurance.

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Maritime Tool

Ship Trim Optimization Fuel Savings & ROI Tool

Translate a vessel-specific trim-performance estimate into realized annual fuel, CO2 and financial value. Simple mode screens one annual business case. Advanced mode separates laden, ballast and partial-load operating states, current and target trim, eligibility, execution, weather retention, validation confidence, implementation cost and downside sensitivity.

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Maritime Tool

Ship Trim, Draft Change & Longitudinal Balance Tool

Estimate cargo loaded or discharged from before-and-after vessel displacement. Simple mode gives a fast cargo-weight screen from ship-table displacement, trim correction, density and deductibles. Advanced performs six-draft reduction, corrections to perpendiculars, selectable hull-deflection treatment, first and second trim corrections, density correction, deductibles and survey-quality diagnostics.

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Maritime Tool

Ship Underwater Radiated Noise Retrofit & Energy Trade-Off Tool

Screen how a noise-control retrofit changes underwater radiated noise and ship energy demand at the same operating condition. Simple mode handles one overall retrofit. Advanced mode combines several URN source contributors in the linear acoustic domain, then attaches net power, CAPEX and annual O&M changes to each measure so acoustic improvement and energy efficiency can be reviewed together.

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Maritime Tool

Ship Voyage Time & ETA Calculator

Calculate voyage duration and arrival ETA from route distance, through-water speed, current, weather loss and operational delays. Simple mode gives a fast schedule screen. Advanced builds the voyage leg by leg, applies speed caps and route allowances, back-solves the speed factor needed to protect a target ETA, and shows how delay, weather and current assumptions move the arrival window.

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Maritime Tool

Shipboard Cable Ampacity, Voltage Drop, Breaker & Retrofit Route Capacity Tool

Screen whether an existing or proposed shipboard circuit can carry a retrofit load without exceeding the entered manufacturer/project cable ampacity or voltage-drop limit. Advanced mode adds starting drop, parallel runs, breaker protection and interrupting duty, route fill and support-weight reserve, multi-circuit retrofit loading and installation readiness.

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Maritime Tool

Shipboard Incinerator Capacity, Waste Load, Fuel Consumption & Heat-Recovery Tool

Turn daily permitted ship-generated waste into an incinerator operating plan. Check solid and sludge feed rates, available burn-window capacity, thermal loading, support-fuel demand for a low-LHV feed mix and useful heat-recovery potential. Advanced mode adds a regulatory waste register, PVC/type-approval logic, prohibited streams, combustion-performance limits, ash and waste storage, annual disposal economics and heat-recovery ROI.

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Maritime Tool

Shipboard Lifting Appliance SWL, Proof Load, Load Radius & 2026 SOLAS Survey Tool

Screen a planned shipboard lift against certified SWL at radius and the 2026 SOLAS survey chain. Advanced adds certified load-chart points, operational load screening, rope and brake demand, proof loads, loose-gear proof formulas, pre-2026 transition status, documentation readiness and repair/survey cost.

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Maritime Tool

Shipboard Power Quality, Harmonic Load & Transformer Capacity Tool

Screen whether added nonlinear shipboard loads fit the transformer without hiding harmonic current behind ordinary kVA. Simple mode combines active/reactive load, added THDi and the entered post-retrofit bus THDv. Advanced mode builds the nonlinear load package row by row, applies filter reductions, estimates RSS and arithmetic worst-case harmonic current, checks transformer derating, neutral triplen exposure, bus voltage distortion and source short-circuit strength.

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Maritime Tool

Shore Power vs Ship Generator Tool

Compare shore electricity with onboard auxiliary generation on a true per-port-call basis. Screen purchased shore energy, generator fuel burn, fixed and demand charges, retained generator load, carbon cost, annual savings, CO₂e reduction, break-even electricity price and optional shore-power retrofit payback.

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Maritime Tool

SIRE 2.0 Tanker Inspection Readiness & Gap Assessment Tool

Screen vessel and operator readiness for a SIRE 2.0 inspection without pretending to predict the exact vessel-specific CVIQ. Simple mode gives a fast readiness picture across programme data, defects, procedures, hardware and crew familiarity. Advanced maps all 12 SIRE 2.0 chapters, hardware/process/human/evidence readiness, Performance Influencing Factors, open gaps, repeat issues, closeout timing and inspection-data readiness into a clearly labelled Ship Universe screening score and action dashboard.

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Maritime Tool

Starting Air Receiver & Compressor Tool Main Engine Starts, Bottle Volume & Recharge Time

Size and screen a marine starting-air system from the engine-start requirement through receiver storage and compressor recovery. Simple mode answers how many starts the installed bottles support, the minimum receiver volume, and recharge time. Advanced adds multiple receivers, connected pneumatic consumers, compressor redundancy, independently driven capacity, one-bottle isolation, low-pressure alarm reserve and live start-by-start pressure and recharge curves.

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Maritime Tool

STCW & MLC Hours of Rest Tool Watch Schedule, Fatigue & Compliance

Build or test a watch schedule against rolling rest/work limits instead of checking only calendar-day totals. Simple mode generates a repeating watch cycle plus routine extra duty and analyzes seven days. Advanced models a 14-day work record, checks every relevant rolling 24-hour and seven-day window, applies normal or deliberately selected STCW exception rules, distinguishes MLC rest-basis from work-basis national implementation, visualizes duty/rest periods and identifies fatigue-pressure patterns that can exist even when the schedule is technically compliant.

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Maritime Tool

Steel Coil Loading, Tanktop Strength & Dunnage Tool

Screen steel-coil stowage against the vessel's approved tanktop and local loading limits, estimate dunnage contact pressure and line load, cross-check coil mass from geometry, test a simplified securing-force case and identify the controlling structural zone before loading.

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Maritime Tool

Stowage Factor & Full-and-Down Tool Cargo Volume, Weight & Hold Capacity

Calculate cargo stowage factor relationships, determine whether a cargo is space-limited or deadweight-limited, find maximum cargo intake, and solve two-cargo Full-and-Down combinations. Simple mode answers the single-cargo intake question quickly. Advanced adds grain/bale capacity, a hold register, cargo-specific broken stowage, exact two-cargo Full-and-Down mathematics, cargo-availability constraints, revenue or tonnage optimization, sensitivity analysis and unused cube/deadweight diagnostics.

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Maritime Tool

Subsea Cable Installation Vessel Cost & Weather Downtime Tool

Convert cable route length and production rates into offshore working days, expected weather standby and installation-vessel cost. Advanced mode separates route segments, burial workflow, metocean operability, cable-load campaigns, support craft, specialist spreads, fuel and port logistics so weather exposure is tied to the actual offshore work package.

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Maritime Tool

Subsea Fiber DAS Dark-Ship Detection, Coastal Coverage & Radar Replacement Tool

Test whether an existing subsea fiber can provide useful vessel-detection coverage for a cable, chokepoint or coastal corridor. Simple mode compares verified pilot performance with mission requirements. Advanced adds cable-segment variability, calibrated SNR range, AIS association, data throughput, analyst workload and a mission-based radar comparison without pretending DAS and radar are equivalent sensors.

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Maritime Tool

Tanker Cargo API Gravity, Density, VCF & Standard Volume Tool

Convert tanker cargo observations into transparent standard-volume and mass quantities without pretending to reproduce licensed ASTM/API petroleum tables. Simple mode handles one cargo quantity using a certified correction factor, measured density ratio or clearly labeled thermal-expansion estimate. Advanced calculates multiple tanks, combines free-water and S&W deductions, converts API gravity and 60°F density, applies optional pressure correction, reconciles ship versus shore/B/L quantities and exposes every tank’s correction chain.

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Maritime Tool

Tanker Cargo Heating Fuel & Cost Calculator

Estimate heat-up energy, voyage temperature-maintenance duty, fired-heater fuel, circulation-power fuel, cargo-heating cost and available heater margin. Advanced mode builds the heating program segment by segment from tank surface heat loss, ambient conditions and recovered-heat availability.

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Maritime Tool

Tanker Cargo Loading & Discharge Hydraulic Tool Pump Rate, Manifold Pressure, Line Loss & Transfer Time

Model the cargo-transfer path instead of assuming nameplate pump rate equals actual transfer rate. Simple mode checks a nominated loading or discharge rate against ship/terminal pressure and line losses. Advanced solves the live pump/system operating point for discharge, achievable loading rate from available manifold pressure, NPSH, pump power, pressure surge, pipe design-pressure margin and a full segment-by-segment hydraulic ledger.

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Maritime Tool

Tanker Cargo Pumping Time, Power & Fuel Cost Tool

Estimate tanker cargo-discharge time, pump demand, energy use and fuel-equivalent operating cost. Advanced mode models the discharge stage by stage and constrains actual flow by the lowest of requested pump throughput, available drive power and an optional terminal or system rate cap.

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Maritime Tool

Tanker Cargo Tank P/V Valve, Vent Mast, Vapour Flow & Pressure/Vacuum Capacity Tool

Convert tanker cargo-transfer rates into the vapour or replacement-air flow the venting system must actually pass. Screen per-tank P/V capacity, common vent capacity, opening-pressure margin, tank-by-tank vent demand, branch and vent-main losses, mast outlet velocity, thermal breathing, inert-gas support and future venting upgrades.

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Maritime Tool

Tanker Inert Gas & Nitrogen Purging Time and Cost Tool

Estimate gas turnovers, purge volume, source run time and operating cost for tanker inerting or purging. Simple mode handles one combined tank volume using an ideal well-mixed dilution model. Advanced mode evaluates multiple tanks, oxygen and hydrocarbon endpoints, empirical turnover factors, source-flow availability, vent/piping limits and vessel-time exposure.

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Maritime Tool

Tanker Tank Cleaning Time, Water & Cost Tool

Estimate tanker cargo-tank cleaning time, tank-cleaning machine hours, gross wash-water circulation, fresh-water makeup, wastewater/slops handling and commercial cost. Advanced mode separates tank groups, machine allocation, wash cycles, final rinse, optional heated wash water and vessel-time exposure without treating the result as a cargo-readiness or discharge authorization.

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Maritime Tool

TPC, TPI & MCTC Tool Draft Change, Waterplane Area & Trim Moment

Calculate tonnes per centimetre immersion, tons per inch immersion, moment to change trim one centimetre and the resulting forward/aft draft changes from loading, discharge or longitudinal weight movement. Simple mode solves one weight event from hydrostatic geometry. Advanced cross-checks hydrostatic-table values, builds waterplane area from Cwp when required, tracks multiple add/remove/shift events, updates displacement and LCG, models water-density transition, screens final drafts and solves the weight-shift distance needed to reach a target trim.

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Maritime Tool

True Wind Tool Apparent Wind, Vessel Motion & True Wind Direction

Convert ship-measured apparent wind into meteorological true wind using the vessel’s heading to orient the wind sensor and COG/SOG to remove Earth-fixed vessel motion. Simple mode returns true wind speed, true wind direction, true-wind angle to the bow and vector components. Advanced adds sensor calibration, alternate vessel-motion reconstruction from STW/current, multi-sample vector averaging, scatter/outlier diagnostics, motion-source comparison and sensitivity to apparent-angle and vessel-speed error.

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Maritime Tool

Under Keel Clearance, Squat & Tidal Margin Tool

Screen critical shallow-water points and route legs from charted depth through tide, draft, squat, dynamic motion and survey uncertainty. The tool separates static from dynamic UKC, compares the result with the entered company or port minimum, and estimates the speed, tide or draft change needed to recover margin.

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Maritime Tool

Vessel Charter Hire Cost Tool

Build the charterer's all-in vessel-access cost and the owner's net-hire view without mixing them together. Simple mode screens quoted daily hire, payable days, off-hire, commissions and fixed charter costs. Advanced adds long-period escalation, delivery/redelivery bunker settlement, mobilization, bareboat operating cost, security deposit, annual schedule and stress testing.

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Maritime Tool

Vessel Crew Cost Calculator

Build a defensible vessel crewing budget from continuous onboard berths, paid off-rotation time, employer burden, scheduled relief, travel and repatriation, victualing, training, welfare, reserve headcount, unplanned replacements and crewing-management overhead. Advanced mode models different wages and rotations by rank.

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Maritime Tool

Vessel Daily Operating Cost, Budget Variance & Cash Break-Even Tool

Build a daily vessel-cost stack without mixing unlike cost definitions. Simple mode converts a monthly operating budget into core running cost, broader accounting vessel OPEX and owner all-in cost. Advanced mode adds a cost register, YTD budget burn, commitments, year-end forecast, peer comparison, TCE cash break-even, savings potential and next-year cost pressure.

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Maritime Tool

Voyage Charter Laytime & Demurrage Tool Statement of Facts, Laytime, Despatch & Demurrage

Turn a voyage-charter timeline into a transparent laytime account. Simple mode gives a fast commercial settlement from commencement, completion and exclusions. Advanced builds loading and discharge stages, derives laytime from fixed hours or cargo rates, handles NOR plus turn time, applies reversible, averaged or separate treatment, and uses a Statement of Facts event register with independent laytime and post-expiry demurrage percentages.

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Maritime Tool

Voyage Profit & TCE Calculator

Turn a voyage fixture into a commercial earnings screen. Simple mode converts freight revenue and total voyage costs into TCE, after-OPEX voyage profit, break-even freight and the freight rate needed to hit a target TCE. Advanced mode builds the voyage clock and bunker bill from laden, ballast, port and delay assumptions, then stress-tests the fixture across freight, fuel and delay scenarios.

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Maritime Tool

Weather-Dependent Container Lashing, Stack Weight & Securing Margin Tool

Use an approved weather-dependent acceleration reduction only when its voyage and forecast conditions are satisfied. Simple converts the approved factor into a stack-weight and securing-margin decision. Advanced adds tier-by-tier transverse force, overturning, uplift, rod and twistlock demand, racking, corner-post compression, unrestricted comparison and re-stow economics.

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Maritime Tool

Wheel-Over Point Tool Rate of Turn, Turning Radius & Course Alteration

Plan a course alteration using steady-turn geometry and ship-response allowance rather than treating the vessel as if it could turn instantly. Simple mode solves radius, tangent distance, practical wheel-over distance, turn time, advance and transfer from speed and target ROT. Advanced adds vessel-specific manoeuvring-booklet data, steering response, shallow-water allowance, turn-speed loss, current translation, ROT limits, available run-in, maximum turn-radius constraints and a multi-turn passage register.

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Maritime Tool

Wind-Assisted Propulsion ROI & Payback Tool

Screen the economics of rotor sails, rigid sails, suction wings, soft sails, kites and other WAPS technologies using vessel-specific fuel demand, route wind exposure, system availability, auxiliary power, bunker prices, carbon value, retrofit cost and recurring OPEX. Advanced mode separates favorable-wind performance from route utilization and shows how fuel-price or wind-performance downside changes the investment case.

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Maritime Tool

Wind-Assisted Propulsion Sizing, Route Benefit, Deck Impact & Retrofit ROI Tool

Screen rotor sails, suction sails, rigid wings, soft sails, kites and other wind-assisted propulsion concepts against the vessel and route that must actually support them. Convert useful wind thrust at ship speed into propulsion-equivalent power, subtract WAPS auxiliary energy, then estimate annual fuel and CO₂ savings, deck impact, topweight, air-draft margin, unit count for a target saving, retrofit cost, payback and lifecycle NPV.

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Maritime Tool

Worldscale Tanker Freight Tool WS Points, Flat Rate, Freight & TCE

Convert a user-supplied WS100 flat rate and market Worldscale level into tanker freight, net freight and voyage TCE. Simple mode answers the commercial question fast. Advanced adds Worldscale variable and fixed differentials, charterparty freight adjustments, full bunker/voyage economics, target-TCE break-even Worldscale, zero-TCE Worldscale, lumpsum-equivalent WS and multi-dimensional WS × bunker sensitivity.

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