Maritime Tools & Calculators

AI Voyage Optimization ROI & Fuel Savings Break-Even Tool

Answer the question that matters before buying routing software: how much fuel must the vessel or fleet actually save before the software pays for itself? Model 1%, 2%, 3% and 5% savings, software and integration costs, route coverage, realized savings, bunker prices, time benefits, carbon value and multi-vessel fleet economics.

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

Separate gross hydrodynamic savings from the electrical energy required to make the air layer. Model sea-state and operating-condition performance, compressor air demand, N+reserve capacity, generator margin, off-state outlet drag, net fuel and CO₂ reduction, retrofit capex, payback and multi-year NPV.

Air Lubrication System ROI & Payback Calculator

Estimate air lubrication system fuel savings, compressor energy penalty, payback, NPV and ROI for a ship or vessel. Compare laden and ballast performance, bunker cost, carbon value, retrofit CAPEX, annual maintenance and lifecycle cash flow.

Alternative Fuel Crew Training, Relief Manning & Transition Cost Tool

Build the crew-readiness runway for a methanol, ammonia, LNG, hydrogen, battery-hybrid or other fuel transition. Model qualification gaps, provider throughput, course reattempts, relief manning, onboard familiarization, launch-date risk and the cost of accelerating or staggering the fleet transition.

Alternative Fuel Crew Training, Relief Manning & Transition Cost Tool

Build the workforce plan behind an alternative-fuel fleet transition. Estimate how many officers and ratings must become fuel-ready, identify training-capacity and relief-manning bottlenecks, calculate recruitment and shadow-manning needs, test whether crews can be ready before vessel transition dates, and quantify the full people-side cost of moving a fleet to a new fuel or propulsion system.

Alternative Marine Fuel Comparison Calculator

Compare VLSFO, MGO, LNG, methanol, ammonia, biofuel and custom marine fuels on an energy-equivalent basis. Model fuel cost, required fuel mass, tank volume, CO₂ emissions, lifecycle GHG intensity, carbon cost, FuelEU planning value, conversion CAPEX, payback, NPV and break-even fuel pricing.

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

Screen whether an existing ship can realistically convert to methanol, ammonia, LNG, LPG, HVO, liquid hydrogen or another fuel. Translate the vessel's current fuel demand into alternative-fuel mass and tank volume, test fuel-system and safety integration readiness, estimate cargo-space impact, build retrofit capex, compare annual fuel and carbon economics, and calculate payback, NPV and break-even fuel prices.

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

Turn an ammonia bunker plan into the hydraulic, toxic-release and emergency-response numbers that can stop the operation. Calculate tank receiving capacity, safe transfer rate, hose velocity and pressure drop, pump power, high-high ullage, post-ESD liquid movement, ERS residual release mass, ambient vapour-equivalent volume, enclosed-space concentration and purge time, required dilution airflow, IMO 110/220 ppm detector thresholds, minimum open-deck toxic areas, dispersion-model safety-zone clearance, bunkering time and five-year system cost.

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

Estimate ammonia and pilot-fuel consumption, voyage fuel cost, required ammonia tank volume, pilot-fuel storage, installed endurance and sailing range. Advanced mode derives the dual-fuel requirement from a conventional-fuel energy baseline.

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

Model the mechanical loads behind offshore anchor handling instead of comparing winches by first-layer pull alone. Estimate anchor and suspended-line load, add seabed breakout, bollard-pull interaction and dynamics, calculate line pull and brake holding at the actual loaded drum layer, estimate wire storage layer-by-layer, screen MBL utilization, size hydraulic or electric drive power, quantify elastic energy trapped in a loaded line, test emergency-release load and payout duty, compare operating cases, and flag the 2026 SOLAS anchor-handling examination and emergency-release readiness items.

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

Turn chain diameter, grade, anchorage depth and chain breaking load into the windlass loads that matter. Calculate IACS-style continuous pull, deep-water correction, short-term breakout pull, brake and chain-stopper holding loads, physical suspended anchor-and-chain load, wildcat torque, electric or hydraulic drive power, recovery time, foundation load and candidate windlass fit.

Ballast Pumping Time, Energy & Port Cost 

Estimate ballast or deballast operation time, effective transfer rate, BWTS bottlenecks, pump and treatment-system energy, generator fuel, direct operating cost and port-time exposure. Advanced mode models multiple ballast stages and identifies where pump capacity or ballast water treatment capacity is restricting the operation.

Ballast Water Treatment System Cost Calculator

Estimate ballast water treatment system cost, BWTS retrofit cost, installation CAPEX, annual operating expense and lifecycle cost. Advanced mode can also estimate required treatment capacity, annual treated ballast volume, power cost, chemicals, service, off-hire and cost per cubic meter treated.

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

Model the operating window of an active-substance ballast water management system from uptake to discharge. Calculate applied oxidant dose, immediate oxidant demand, residual TRO, active-substance production capacity, first-order decay during tank holding, natural time to a discharge setpoint, neutralizer mass and dosing-pump flow, sensor uncertainty, tank turnover, chemical and energy cost, challenging-water-quality derating and the actual IMO D-2 biological limits. Advanced mode tracks individual ballast tanks with different volumes, TRO and holding periods.

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.

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

Turn windage, underwater current load and maneuvering moment into a bow-and-stern thrust requirement. Split force around the vessel's center of rotation, correct for tunnel and forward-speed losses, test candidate thruster kN and kW, screen tunnel geometry and thrust density, check generator reserve, and see where the maneuvering envelope actually runs out.

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.

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.

Bunker ROB, Range & Endurance Calculator

Estimate safe steaming endurance, maximum range, voyage fuel requirement, arrival ROB and minimum bunker uplift. Use Simple mode for one combined fuel pool or Advanced mode to track VLSFO and MGO separately.

Buy vs Charter vs Lease a Ship Calculator

Compare the long-term cost of purchasing a vessel, taking it on time charter or using a bareboat / finance lease. Analyze total cash cost, present value, annual equivalent cost, cost per vessel day, residual value, financing and break-even charter rates.

Cargo Hold Ventilation, Dew Point & Sweat Risk Tool

Compare cargo-hold and outside-air dew points, screen for cargo sweat and ship sweat, assess outside-air drying potential and review a configurable three-degree ventilation comparison. Advanced mode models changing voyage conditions and identifies the periods with the highest condensation exposure.

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.

CII Rating Calculator for Ships

Calculate attained CII, required CII and the IMO A to E Carbon Intensity Indicator rating using ship type, capacity, annual distance and fuel consumption or verified CO2 emissions. The tool also shows C-rating headroom, fuel reduction estimates and the rating outlook through 2030.

Container Ship Break-Even Freight Rate & Slot Revenue Calculator

Estimate the freight rate, slot revenue and vessel utilization needed for a container service to cover voyage costs or reach a target margin. Advanced mode separates outbound and inbound economics, cargo handling, empty repositioning, bunker cost, commissions, carbon cost and annual round-trip performance.

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.

Cruise Ship Food Waste Cost & Digester ROI Calculator

Estimate cruise ship food waste generation, digester throughput, landed-waste reduction, power and fuel impact, water and consumable cost, labor savings, annual operating benefit, payback, NPV and IRR. Advanced mode separates guest, crew and galley waste while modeling capacity utilization, disposal routing, cold-storage energy, shore power and full retrofit CAPEX.

Cruise Ship Freshwater Production & Desalination Cost Tool

Estimate hotel-water demand, onboard desalination production, shore-water purchases, storage reserve, energy use and cost per cubic meter. Advanced mode separates reverse osmosis and evaporator production, sea and port utilization, fixed service cost and investment payback versus an all-bunkered-water baseline.

Cruise Ship Fuel Consumption & Bunker Cost Calculator

Estimate cruise ship fuel consumption, annual bunker cost, fuel budget, CO2 emissions and cost per passenger-day. Advanced mode separates primary and secondary fuels, sea, port and anchorage consumption, shore-power fuel reduction, bunkering fees and multi-year fuel-price projections.

Cruise Ship Galley Electrical Load, Steam & Peak Demand Tool

Estimate connected galley load, normal and peak electrical demand, steam demand, electrical steam-generation load, feeder margin, steam header margin, daily energy, steam consumption and utility intensity per meal. Advanced mode models individual galley equipment groups with separate electrical and steam demand factors.

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

Estimate normal and peak cruise hotel electrical demand, battery power and energy required to cap a short-duration peak, post-battery generator or shore load, annual battery throughput, recharge energy, round-trip losses and optional peak-shaving economics. Advanced mode builds hotel demand from individual load categories.

Cruise Ship HVAC Energy & Fuel Savings Calculator

Estimate cruise ship HVAC electricity savings, auxiliary-generator fuel avoided, shore-power savings, CO2 reduction, annual operating benefit, payback, NPV and IRR. Advanced mode separates chillers, ventilation fans, pumps and terminal loads while modeling retrofit performance, onboard generation, shore power and full project CAPEX.

Cruise Ship Laundry Water, Steam & Energy Cost Tool

Estimate cruise laundry throughput, fresh-water demand, wastewater, hot-water heating load, steam consumption, electricity, boiler-fuel equivalent and annual utility cost. Advanced mode models separate laundry categories such as guest linen, towels, uniforms and galley linen.

Cruise Ship Shore Power Cost & Savings Calculator

Compare cruise ship shore power cost with running onboard generators at berth. Estimate electricity expense, bunker fuel avoided, annual savings, CO2 reduction, shore power retrofit payback, NPV and the break-even electricity rate for a cruise vessel.

Cruise Ship Wastewater Treatment Capacity & Cost Calculator

Dry Bulk Cargo Hold Cleaning Time, Water & Cost Tool

Estimate hold-cleaning duration, wash-water demand, chemical use, wastewater, sludge, heating energy, labor, equipment cost and vessel-time exposure. Advanced mode models different holds, cleaning difficulty, residue loading, machine allocation, crew allocation and concurrent cleaning waves.

EEXI Calculator

Estimate attained EEXI, required EEXI and ship compliance under MARPOL Annex VI. Model original or engine-limited propulsion power, reference speed, specific fuel consumption, auxiliary power and ship-type reduction requirements.

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.

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.

EU ETS + FuelEU Voyage Cost Calculator

Estimate EU ETS allowance exposure and voyage-attributed FuelEU Maritime compliance cost. Use Simple mode for a quick voyage estimate or Advanced mode to model multiple fuels, intra-EU, extra-EU and EU-port consumption.

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.

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.

FuelEU Maritime Pooling, Banking & Borrowing Strategy Tool

Compare fleet pooling, same-ship banking, advance borrowing and penalty exposure across the current and next reporting period. Build a ship-level compliance portfolio, test the pool validity constraints, quantify borrowing debt and identify the lowest-cost flexibility path before verifier submission.

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

Decide whether paying for methane-slip measurement and continuous engine-load monitoring is worth more than accepting the FuelEU default factor. Compare default and measured well-to-wake intensity, quantify the FuelEU compliance-balance swing, calculate EU ETS methane allowance savings, risk-adjust the result for verifier acceptance, build the Methane Slip File investment case, project tightening FuelEU limits, and find the measured Cslip needed to hit a target payback.

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

Turn an ultrasonic hatch-cover test into an owner-level repair and risk decision. Compare closed-hatch readings with the Open Hatch Value acceptance threshold, rank leak locations, quantify failed seal length, screen gasket compression and securing condition, build a repair and retest budget, estimate cargo-at-risk and probability-weighted wet-cargo exposure, and show whether repairing the hatch now is economically justified before the next sensitive cargo.

Hull Cleaning ROI & Fuel Savings Calculator

Estimate fuel savings, payback and ROI from underwater hull cleaning. Model current fouling penalty, clean-hull fuel consumption, fuel price, operating days, cleaning cost, off-hire, fouling regrowth, CO₂ avoided and the break-even point for a cleaning project.

Hull Steel Renewal Weight, Plate, Labor & Drydock

Turn a steel renewal scope into a shipyard-ready budget. Estimate installed tonnes, stock plate procurement, nesting waste, billable tonnage, benchmark man-hours, labor cost, coating and NDT extras, steel-work duration, drydock extension and off-hire exposure. Advanced mode handles multiple renewal locations with different thicknesses, access factors and curvature.

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.

IACS E26/E27 Cyber Readiness Assessment Tool

Screen ship-level cyber resilience and onboard equipment or supplier readiness across asset identification, protection, detection, response, recovery, network architecture, access control, secure configuration and product lifecycle assurance. Generate readiness scores, critical-gap counts, category heatmaps and a prioritized improvement list.

Just-in-Time Arrival Fuel & Waiting Cost Optimizer

Compare sailing at the current planned speed and arriving early to wait with slowing down for a berth-ready time. Estimate the required JIT speed, sailing and anchorage fuel, waiting hours, bunker savings, carbon value and total voyage savings.

Just-in-Time Arrival Fuel & Waiting Cost Optimizer

Compare sailing at the current planned speed and arriving early to wait with slowing down for a berth-ready time. Estimate the required JIT speed, sailing and anchorage fuel, waiting hours, bunker savings, carbon value and total voyage savings.

Laytime & Demurrage Calculator

Calculate laytime used, time remaining or exceeded, estimated demurrage and despatch. Use Simple mode when you already know the countable time, or Advanced mode to calculate countable laytime from commencement, completion and excluded or partially counted periods.

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.

LNG Carrier Boil-Off Gas & Cargo Loss Tool

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

Turn the ship's actual gas consumers into an FGSS design envelope. Calculate peak and annual LNG demand, pressure and temperature requirements, BOG contribution, cryogenic pump flow and electrical load, vaporizer and gas-heater duty, N+1 equipment capacity, tank endurance, bunkering time, parasitic energy and the fuel-spread required to recover the FGSS investment.

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

Screen a marine battery energy storage installation as a complete safety chain. Test ventilation, gas and fire detection, automatic isolation, fixed-water capacity, drainage, SCBA resources, response timing and zone-by-zone readiness before detailed class, flag and OEM review.

Marine Battery Hybrid ROI & Battery Sizing Calculator

Size a marine battery energy storage system for peak shaving, load leveling and hybrid generator operation. Estimate required MWh and MW, annual battery throughput, generator fuel savings, shore charging cost, CO2 reduction, battery replacement timing, payback, NPV, IRR and lifecycle ROI.

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

Build the ship's auxiliary steam balance from actual consumers instead of boiler nameplate alone. Calculate sea, port or cargo-operation demand, distribution loss and margin, dispatch waste-heat and electric steam before fired boilers, convert steam production into burner fuel using pressure and feedwater enthalpy, check burner and fuel-supply capacity, test one-boiler-out critical steam coverage, quantify feedwater and make-up water, identify excess-steam dump demand, and estimate annual steam-plant operating cost.

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

Estimate methane and nitrous-oxide emissions from the entered engine duty profile, then compare full continuous emissions measurement, engine-load monitoring with measured emission maps, and a targeted hybrid strategy. Size analyzers, sampling points, load interfaces and test campaigns, compare data coverage and uncertainty targets, calculate installation and lifecycle monitoring cost, and identify which engines should receive direct CEMS first.

Marine Coating Lifecycle, Recoating & Drydock Cost Tool

Build a coating lifecycle around actual recoating intervals and drydock timing. See when coatings fall out of sync with planned docking, quantify off-cycle docking exposure, separate coating work from yard and off-hire cost, and compare the lifetime economics of a conventional coating against a longer-life alternative.

Marine Compressed Air Leak & Compressor Energy Cost Tool

Estimate compressed-air leakage, wasted compressor power, annual leaked-air volume, electricity or generator-fuel cost, equivalent fuel consumption, emissions and repair payback. Advanced mode models multiple compressors and individual leak-survey findings.

Marine Condition Monitoring Sensor Coverage & Criticality Tool

Map critical shipboard machinery against the failure modes your monitoring system can actually see. Score machinery criticality, quantify mechanical, lubrication, thermal, electrical, process and leakage coverage, test the full data-to-action chain, expose critical blind spots and rank the next monitoring upgrades.

Marine Cylinder Oil Consumption & Cost Tool

Estimate two-stroke marine cylinder oil consumption from engine power, load, operating hours and user-entered feed rate. Calculate daily and annual oil use, liters, drums, lubricant cost, cost per MWh, cylinder-oil-to-fuel ratio and onboard ROB endurance. Advanced mode models multiple engine-load periods with different feed rates.

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

Screen a retrofit from conventional AC distribution toward a shipboard DC grid. Size DC-bus current and converter capacity, map AC/DC, DC/DC and DC/AC power paths, quantify conversion losses, test reserve and critical-load capacity, compare the proposed electrical-chain efficiency with the existing plant, and calculate avoided generator energy, fuel savings, electrification value, payback and lifecycle ROI.

Marine Engine Overhaul Cost & Downtime Tool

Estimate engine-overhaul labor, parts, specialists, workshop costs, logistics, contingency and the commercial value of downtime. Advanced mode builds the estimate from individual work packages, calculates average workforce requirements and compares overhaul exposure with an optional engine replacement scenario.

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

Screen whether an engine change is routine maintenance, a substantial modification, a more-than-10% MCR uprating, a replacement-engine major conversion or a voluntary higher-Tier certification. Calculate the applicable NOx Tier limit from rated speed, compare weighted engine-cycle emissions, size the required NOx reduction, test SCR / EGR / tuning performance, estimate reductant and fuel penalties, build the onboard certification budget, check the new 1 September 2026 section 7.2 test-plan requirements, and expose the real commercial cost of re-certifying an installed marine diesel engine.

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

Compare three shipboard power architectures on the same duty profile: conventional generator-only, fuel-cell plus battery buffer, and generator plus battery hybrid. Size continuous power, peak-support battery kW and kWh, critical-load endurance and fuel storage, then compare capex, fuel, maintenance, replacements, lifecycle carbon value, TCO and crossover economics.

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

Convert engine fuel demand into the separator flow that must actually be processed. Correct candidate capacity for fuel-specific performance, setpoint and availability, test one-unit-out redundancy, size electric or steam heating duty, estimate separation viscosity from two laboratory points, calculate water / solids / oil-loss sludge volume, predict discharge frequency and sludge-tank endurance, and compare purifier candidates without confusing maximum flow with separation performance.

Marine Heat Exchanger Fouling, Cooling Capacity & Cleaning ROI Tool

Quantify lost heat-transfer capacity, cooling margin, pressure-drop penalty and cleaning economics. Advanced mode ranks multiple coolers and lets you build a targeted cleaning package instead of assuming every exchanger should be opened.

Marine Heat Exchanger Fouling, Cooling Capacity & Cleaning ROI Tool

Model fouling resistance, heat-transfer loss, cooling-duty margin, outlet temperatures, pressure-drop energy penalty and cleaning economics. Compare current, clean and post-clean performance, identify the thermal bottleneck and estimate when cleaning becomes financially justified.

Marine Predictive Maintenance Sensor ROI & Failure-Avoidance Tool

Test whether permanently installed condition-monitoring sensors and predictive analytics can justify their cost on shipboard machinery. Model failure exposure, detection probability, data availability, actionable warnings, false alarms, planned interventions, downtime avoided, maintenance savings, software cost, sensor capex and multi-year ROI.

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

Turn propulsion power and rpm into the torque every drivetrain component must carry. Screen traditional propulsion-shaft diameter against IACS UR M68, calculate hollow-shaft torsional stress, compare gearbox input / output torque and service factor, test coupling continuous and peak torque, model transient and derated operating cases, identify the weakest component, and estimate how much additional shaft power the existing train can accept before a shaft, gearbox or coupling becomes the limiting item.

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.

Marine Retrofit Electrical Load, Generator & Switchboard Capacity Tool

Screen whether a new electrical retrofit fits the vessel's running-load envelope, generator lineup, N-1 resilience, switchboard current capacity, motor-starting demand and future growth margin before detailed OEM, class and protection-coordination studies.

Marine Retrofit ROI Calculator

Marine SCR Urea Consumption & NOx Cost Calculator

Estimate baseline NOx mass, SCR removal, urea-solution consumption, tank capacity, catalyst and utility cost, post-SCR NOx intensity and cost per tonne of NOx removed. Advanced mode builds the calculation from multiple engine operating segments with different loads, hours, baseline NOx factors, SCR-active shares and removal efficiencies.

Marine Spare Parts Inventory & Stockout Cost Tool

Estimate whether carrying a critical marine spare is economically justified by comparing annual inventory ownership cost with expected stockout exposure. Calculate lead-time demand, service level, expected shortage units, target stock, an economic stock level and the annual cost of downtime, emergency sourcing and obsolescence. Advanced mode screens an entire spare-parts portfolio.

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

Estimate battery containers required per vessel, usable energy per container, port swap time, charging bays, charging MW, charged staging inventory, containers in the charging cycle, total battery-container fleet and high-level infrastructure cost. Advanced mode models multiple vessel services sharing the same battery-swap port.

Marine VFD Pump & Fan Energy Savings ROI Tool

Estimate the energy, fuel-equivalent operating cost and ROI impact of adding variable frequency drives to centrifugal marine pumps and fans. Compare existing throttle, valve, damper or other fixed-speed control with variable-speed operation while accounting for static head or fixed-pressure requirements, drive efficiency, operating hours, installation cost and maintenance.

Marine Waste Heat Recovery ROI & Power Savings Calculator

Estimate ship waste heat recovery power generation, auxiliary fuel savings, engine fuel penalty, CO2 reduction, annual operating savings, payback, NPV and IRR. Advanced mode models exhaust, jacket-water, charge-air and other heat sources separately, then applies conversion losses, parasitic load, maintenance and full retrofit CAPEX.

MASS Remote Operations Centre Connectivity & Resilience Tool

Model primary and backup vessel-to-shore communications, bandwidth, latency, failover time, path independence, remote operations centre availability and onboard fallback endurance. Estimate end-to-end availability, annual downtime, target gaps, weak redundancy points, resilience score and annual connectivity cost.

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

Turn a methanol bunker quantity into the transfer-system numbers that actually control the operation. Calculate tank receiving capacity, safe bulk transfer rate, per-hose flow and velocity, Reynolds number and Darcy pressure loss, pump discharge pressure and kW, vapor-return capacity, hose pressure-rating margin, high-high shutdown ullage, post-ESD transfer volume, ERS exposed spill volume and pool area, topping time, drain / purge time, total berth-side bunkering time, and the component that limits the transfer rate.

Methanol Fuel Tank Sizing, Range & Cargo Space

Estimate required methanol fuel mass, gross tank volume, installed endurance, sailing range and the additional ship-space footprint versus a conventional reference fuel. Advanced mode separates sea and port consumption, tank heel, pilot fuel, installation-space allowances and voyage fuel economics.

Methanol Fuel Tank Sizing, Range & Cargo Space 

Estimate required methanol fuel mass, gross tank volume, installed endurance, sailing range and the additional ship-space footprint versus a conventional reference fuel. Advanced mode separates sea and port consumption, tank heel, pilot fuel, installation-space allowances and voyage fuel economics.

Mooring Line MBL, Tension & Recoil Energy Calculator

Compare mooring line tension with Ship Design MBL, installed line break force and working load limits. Estimate dynamic peak tension, line utilization, strength margin, fairlead resultant load, elastic stretch and stored recoil energy for the main line and optional mooring tail.

Mooring Winch Brake Rendering, Drum Layer & Brake Test Tool

Calculate the brake torque and hydraulic test pressure behind a safe mooring winch setting. Screen the MEG4 60% operational rendering target, 80% design holding reference, split versus undivided drum layers, line WLL and LDBF hierarchy, measured brake-test pressure, over-tight and under-holding brakes, annual test due dates and deck-wide winch results.

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

Compare conventional spare-part procurement with additive manufacturing using landed cost, material, machine time, labor, qualification, reprint allowance and lead time. Estimate direct savings, days of availability recovered, expected downtime value, print-farm workload, break-even economics and the readiness-adjusted advantage of printing.

Naval Chilled Water Plant Load, Cooling Margin & Redundancy Tool

Estimate coincident chilled-water demand, future design load, required flow, online chiller loading, reserve margin, largest-unit-loss capability, N+1 redundancy, casualty cooling shortfall, thermal-storage endurance and plant electrical demand. Advanced mode models individual ship cooling loads and chiller units.

Naval Dry Dock Capacity & Fleet Availability Calculator

Naval Ship Electrical Load, Power Margin & Generator Redundancy Tool

Estimate ship service electrical demand, online generator loading, reserve margin, N+1 capability, largest-generator-loss exposure, additional generation required and load shedding after a generator casualty. Advanced mode models individual generators and prioritized electrical loads.

Naval Ship Lifecycle Cost Calculator

Estimate naval ship lifecycle cost across acquisition, crew, fuel, maintenance, mission-system support, depot availabilities, modernization and disposal. Compare present-value fleet cost, annual equivalent cost, sustainment share, cost per ship-year and cost per deployed day.

Naval Ship Maintenance Delay & Availability Cost Calculator

Estimate the direct cost, readiness impact and fleet-availability loss caused by naval ship maintenance delays. Model lost ship-days, shipyard and contractor extensions, crew and support costs, schedule cascade exposure, replacement or mitigation spending, return-to-service slippage and the economics of accelerating recovery.

Naval Shipyard Workforce, Man-Day & Maintenance Throughput Tool

Estimate maintenance work-package duration, productive man-days, trade bottlenecks, straight-time and overtime labor cost, targeted workforce required to hit a schedule, annual shipyard throughput, dock capacity constraints and backlog clearance. Advanced mode models individual trades and partial overlap between work streams.

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

Estimate the economic impact of an off-spec bunker incident, including fuel value loss, de-bunkering, salvage recovery, replacement-fuel price differential, tank cleaning, disposal, testing, survey costs, machinery damage and vessel delay. Advanced mode models multiple affected fuel lots or tanks and concurrent de-bunkering waves.

Offshore Wind Installation Vessel Cost & Weather Downtime Tool

Estimate wind-turbine installation vessel days, weather downtime, marine spread cost, fuel, support-vessel expense and cost per turbine or installed megawatt. Advanced mode separates foundation and turbine installation phases, multiple WTIVs and an editable support-vessel fleet.

Onboard Carbon Capture ROI & Storage Capacity Calculator

Estimate onboard carbon capture system economics, CO2 capture, energy penalty, fuel cost, storage capacity, offloading frequency, lifecycle cost, break-even carbon value, payback and NPV. Advanced mode models capture plant performance, compression and liquefaction energy, onboard CO2 tanks and downstream handling.

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.

Port Call Cost & Disbursement Account Calculator

Estimate vessel port call cost, proforma disbursement account, advance funding and expected final disbursement account. Build a PDA from port dues, pilotage, towage, berth, terminal, agency, husbandry and other charges, then estimate cost per day, GT and cargo tonne.

Port Congestion Delay Cost Calculator

Estimate the financial impact of port congestion across vessel time, idle fuel, port and terminal charges, cargo carrying cost, storage, schedule disruption and emissions. Advanced mode separates anchorage, berth queue, terminal delay and other phases, then calculates recoverable compensation, net exposure, expected scenario cost and cost per cargo unit.

Port Shore Power Grid, Transformer & Cable Capacity Tool

Size port-side shore-power infrastructure from simultaneous vessel demand, diversity, transformer loading, redundancy, cable ampacity, voltage drop and available utility capacity. Estimate transformer count, installed MVA, berth cable circuits, main feeder circuits, annual energy, grid reinforcement and high-level infrastructure cost.

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.

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

Screen propeller boss cap fins, pre-swirl fins and stators, ducts, rudder bulbs and fins, propeller optimization, wake-improvement devices and combined packages. Translate a vessel-specific hydrodynamic savings estimate into annual fuel, power and CO₂ reduction, test whether the device fits the vessel's operating profile, build retrofit and off-hire cost, compare candidates, and calculate payback, NPV and break-even savings.

Propeller Polishing ROI & Fuel Savings Calculator

Estimate propeller polishing fuel savings, payback and ROI for a ship or vessel. Model current propulsion fuel burn, expected fuel reduction, bunker price, sea days, polishing cost, off-hire, CO2 avoided and the break-even point for polishing the propeller.

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

Screen the shaftline beyond static bearing load alone. Estimate aft and forward bearing reactions, propeller overhang moment, shaft self-weight, bearing projected pressure, measured jack-load correlation, relative shaft-to-bearing slope, running-condition propeller load shift, critical hydrodynamic lubrication speed, EAL / viscosity sensitivity and the cost exposure behind an alignment correction or stern-tube bearing intervention. Advanced mode solves an Euler-Bernoulli beam model from shaft segments, bearing positions and vertical offsets.

Reefer Container Power & Fuel Cost Calculator

Estimate reefer container electrical demand, total energy consumption, auxiliary-generator fuel use, shore-power cost, generator maintenance, carbon cost and cost per reefer-day. Advanced mode separates chilled, frozen and special-cargo reefers while adding electrical losses, energy-management savings, peak-demand diversity and available reefer-power capacity.

Remote Ship Inspection Drone vs Scaffold Cost & Downtime Tool

Compare a drone-led remote inspection with full scaffold access using vessel-specific inspection scope, access difficulty, physical follow-up, erection and dismantling time, off-hire exposure and yard support cost. See whether remote inspection really saves money after re-flights, targeted close-up follow-up and operational downtime are included.

Remote Ship Inspection Drone vs Scaffold Cost & Downtime Tool

Compare drone-based remote inspection, full scaffold access and a targeted hybrid plan for tanks, holds and high structures. Model access preparation, inspection productivity, contact-measurement follow-up, disruption, coating touch-up, surveyor time, vessel downtime and repeated-campaign break-even.

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.

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

Size the water-based protection problem and the drainage problem together. Calculate prescriptive fire-water demand by deck height and system type, simultaneous deluge-section flow, fire-hose contribution, pump margin, finite water-source endurance, gravity scupper and drainage-pump capacity, the SOLAS 125% drainage screen, accumulated deck water, flood depth, added weight, free-surface correction, residual GM, off-centre water heel and the time available before a drainage shortfall becomes a stability issue.

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

Plan the move from legacy S-57 ECDIS into the S-100 era without treating 2029 as a blanket fleet-replacement deadline. Compare software, processor and workstation upgrade paths, map bridge-interface work, select S-100 data products, size crew familiarization, phase fleet rollout and build a realistic transition budget.

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.

Ship CO₂ Emissions Calculator

Calculate ship CO₂ emissions from fuel consumption, voyage distance and vessel operating profile. Estimate sea and port emissions, CO₂ per nautical mile, transport-work carbon intensity, annual emissions and optional carbon-cost exposure.

Ship Drydock Cost Calculator

Estimate vessel dry docking cost, shipyard spending, hull coating, steel renewal, repairs, surveys, dock-day charges and off-hire exposure. Use Advanced mode to build a detailed drydock budget from vessel dimensions, unit rates and individual work packages.

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

Compare drydock slots on the economics that matter beyond the yard quote. Model waiting, deviation, yard days, commissioning, schedule-delay risk, scope growth, missed fixtures and the revenue contribution sacrificed while the vessel is unavailable. Advanced mode ranks multiple slot options and shows how much premium a faster slot can justify.

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

Convert electronic-inclinometer roll data into an owner/operator risk picture. Screen the new SOLAS carriage requirement, IMO instrument performance, roll-period resonance proximity, peak roll rate and angular acceleration, motion-derived transverse cargo acceleration, friction and lashing demand, cargo-shift margin, overturning margin, threshold exceedance cycles, VDR interface readiness and the potential value of earlier operational intervention.

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

Convert electronic-inclinometer roll data into an owner/operator risk picture. Screen the new SOLAS carriage requirement, IMO instrument performance, roll-period resonance proximity, peak roll rate and angular acceleration, motion-derived transverse cargo acceleration, friction and lashing demand, cargo-shift margin, overturning margin, threshold exceedance cycles, VDR interface readiness and the potential value of earlier operational intervention.

Ship Emergency Power, UPS & Blackout Endurance Tool

Model the full blackout chain instead of only generator capacity. Compare UPS ride-through against generator start and bus transfer time, visualize emergency-generation margin, test largest-unit loss, identify the first loads that must be shed, and estimate fuel endurance under normal and degraded emergency modes.

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.

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

Build an engine-room air balance from diesel combustion demand and machinery heat emission, identify whether thermal load or the combustion-air minimum controls the design, size supply and extraction fans with reserve capacity, estimate intake free area, air changes, fan electrical power and annual operating cost, and expose retrofit bottlenecks before the ventilation package is specified.

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

Turn statutory fire-pump capacity and actual pipe geometry into a hydraulic fire-main screen. Check minimum pump count and per-pump capacity, farthest-hydrant residual pressure, nozzle jet flow, main-pipe velocity, pump discharge pressure and motor kW, one-pump-out capacity, emergency fire-pump flow and pressure, suction / NPSH margin, and the effect of pipe diameter, elevation and fittings on the system.

Ship Fuel Consumption Calculator

Calculate vessel fuel consumption, bunker cost, voyage fuel requirement, CO₂ emissions and annual fuel spend. Use Simple mode for a fast distance-and-speed estimate or Advanced mode for laden, ballast, auxiliary and port consumption.

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.

Ship Loan & Vessel Financing Calculator

Estimate ship loan payments, vessel financing costs, required equity, loan-to-value, total interest, balloon balance and debt-service coverage. Advanced mode also calculates minimum TCE required to cover vessel OPEX and debt service.

Ship Machinery Failure Downtime, Spare Strategy & Repair Cost Tool

Model what a machinery failure really costs when repair labor, vessel downtime, sourcing delays, emergency freight and inventory capital are considered together. Compare no dedicated spare, pooled shore stock and onboard spare strategies, estimate lead-time stockout risk and identify which machinery deserves scarce spare-parts capital first.

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.

Ship Repair Cost & Man-Hour Estimator

Ship Satellite Network Addition ROI, Redundancy & Connectivity Value Tool

Should a shipowner add Amazon Leo, Starlink, OneWeb, GEO VSAT, L-band or another satellite path to a vessel that is already connected? Model the value of a second independent network through avoided outage hours, improved availability, additional bandwidth, remote support, digital operations and crew connectivity, then compare those benefits with terminal, installation, airtime, integration and power costs.

Ship Scrubber ROI Calculator

Calculate scrubber payback, annual fuel savings, ROI, NPV and IRR from the price spread between high-sulfur fuel and compliant fuel. Model installation cost, fuel consumption, scrubber operating costs, power penalty, washwater restrictions, downtime and long-term fuel prices.

Ship Shaft Generator ROI & Fuel Savings Calculator

Estimate shaft generator fuel savings, annual electrical energy, auxiliary generator fuel avoided, incremental main-engine fuel, maintenance savings, CO2 reduction, payback, NPV and IRR. Advanced mode models PTO operating hours, generator capacity, gearbox and converter losses, separate fuel prices, maintenance effects and full retrofit CAPEX.

Ship Speed vs Fuel Cost Optimizer

Compare the cost of sailing faster or slower and estimate the economic speed that best balances bunker consumption against the value of voyage time.

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.

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.

Ship Trim Optimization Fuel Savings & ROI 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.

Ship Underwater Radiated Noise Retrofit & Energy Trade-Off Tool

Screen underwater radiated noise retrofit options against vessel speed, fuel consumption, voyage time, operating cost and carbon impact. Compare the modeled noise benefit of propeller, wake-flow, machinery-isolation and maintenance measures while seeing whether energy savings or penalties change the economic case.

Ship Voyage Time & ETA Calculator

Calculate voyage duration, effective speed and ETA from nautical-mile distance, vessel speed, weather or current loss, operational delays and time-zone offsets. Advanced mode builds the voyage leg by leg and adds schedule-buffer analysis, required speed to meet a target arrival and ETA sensitivity.

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

Screen whether an existing or proposed shipboard cable circuit can carry a retrofit load without exceeding derated cable ampacity, voltage-drop limits or breaker protection windows. Simple mode answers the core circuit question quickly. Advanced adds starting drop, detailed derating, breaker fault duty, route fill/weight, multiple retrofit circuits and installation readiness.

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

Turn daily garbage and sludge generation into an incinerator operating plan. Separate permitted from prohibited streams, calculate solid and liquid feed rates, test mass and thermal capacity, estimate support-fuel demand for wet or low-LHV waste, project ash and waste-storage endurance, screen the IMO combustion-performance envelope, and quantify the value of an integrated heat-recovery package.

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

Screen a shipboard crane, derrick or lifting appliance from the lift itself through the 2026 statutory survey chain. Check certified SWL at the working radius, total suspended load, operational dynamic-equivalent demand, minimum port / sheltered-water proof load, hoist-rope line pull, sheave reaction, brake holding, suspended-load moment, loose-gear proof-test requirements, annual thorough examination, five-year retest status, existing-appliance transition requirements and the cost of restoring a deficient appliance to service.

Shipboard Power Quality, Harmonic Load & Transformer Capacity Tool

Turn shipboard nonlinear loads into a transformer and distribution-bus capacity screen. Model fundamental and harmonic RMS current, user-entered transformer derating, neutral current from triplen harmonics, measured voltage distortion, load losses, active-filter sizing and the point where a power-quality problem becomes a capacity problem.

Shore Power vs Ship Generator Calculator

Compare the cost and emissions of using shore electricity at berth versus running the vessel's onboard generators. Model berth load, energy use, utility rates, demand charges, generator fuel consumption, bunker price, maintenance, connection costs, carbon costs and annual port-call savings.

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.

Subsea Cable Installation Vessel Cost & Weather Downtime Tool

Estimate cable-lay vessel days, burial workload, expected weather downtime, cable-load campaigns, support-vessel costs, specialist spread cost, fuel, port logistics and total marine installation cost. Advanced mode models route segments with different lay rates, burial requirements and weather operability.

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

Put the eight numbers behind a Distributed Acoustic Sensing surveillance decision onto one screen. Convert existing subsea fiber into monitored corridor length and area, derive detection range from a site-calibrated acoustic SNR model, calculate vessel warning time, combine channel and localization uncertainty, estimate dark-vessel detection and false-alert workload, size DAS channels and raw data, compare interrogator count with coastal radar sites, and screen whether DAS could replace another radar in a cable-aligned mission or is better used as a hybrid sensor.

Tanker Cargo Heating Fuel & Cost Calculator

Estimate tanker cargo heat-up energy, temperature-maintenance load, boiler or thermal-heater fuel consumption, heating cost, required heating capacity and cost per cargo tonne. Advanced mode calculates tank heat loss from surface area and overall heat-transfer coefficient while adding waste-heat contribution, circulation-pump fuel, carbon cost and heater-capacity screening.

Tanker Cargo Pumping Time, Power & Fuel Cost Tool

Estimate tanker cargo discharge rate, pumping time, power demand, energy use, fuel consumption and berth-time cost. Advanced mode models multiple discharge stages using cargo density, total dynamic head, pump efficiency, drive efficiency and optional pump-power limits.

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

Convert cargo transfer rates into the vapour and air flows the tank venting system must actually pass. Screen loading displacement, cargo vapour generation, thermal breathing, inert-gas purge flow, discharge replacement demand, per-tank P/V capacity, common vent-mast capacity, vent-line velocity and Darcy pressure loss, predicted cargo-tank pressure and vacuum, mast outlet velocity, secondary venting readiness and the emerging 0.20 bar crude-oil P/V opening-pressure requirement.

Tanker Inert Gas & Nitrogen Purging Time and Cost Tool

Estimate gas volume, source-limited purging time, tank-batch sequencing, inert-gas or nitrogen production cost, electrical energy, fuel use, labor and vessel-time exposure. Advanced mode models multiple tank groups and different gas sources without prescribing gas-quality targets or operating procedures.

Tanker Tank Cleaning Time, Water & Cost Tool

Estimate tanker cargo-tank cleaning campaign time, tank-cleaning machine hours, wash-water circulation, fresh-water makeup, wastewater and slop volume, heating fuel, labor, disposal cost and vessel-time exposure. Advanced mode models multiple tank groups with different cleaning cycles, wash durations and machine requirements.

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.

Vessel Charter Hire Cost Calculator

Calculate vessel charter hire, payable charter days, off-hire deductions, commissions, bunker settlements and total charter cost. Use Simple mode for a quick daily-rate estimate or Advanced mode for longer time-charter and bareboat structures.

Vessel Crew Cost Calculator

Build a true annual vessel crewing budget instead of multiplying onboard headcount by average wages. Separate continuous berth payroll from paid off-rotation time, size the theoretical and budgeted relief pool, calculate joining and repatriation movements, add unplanned replacements, overlap, victualing, medicals, training, PPE, welfare, crewing fees and management overhead, then forecast the budget and identify the biggest cost and manning risks. Advanced mode models different rotations and wages by rank.

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

Build a defensible daily operating-cost stack from crewing, technical spend, lubricants, management, insurance, compliance and vessel-specific costs. Separate core running costs from accounting vessel OPEX and drydock/capital reserves, then test YTD budget burn, forecast year-end spend, peer benchmark gap, utilization burden, TCE margin and next-year cost pressure.

Voyage Profit & TCE Calculator

Estimate voyage earnings, time charter equivalent, break-even freight and after-OPEX profit. Use Simple mode for a fast estimate or Advanced mode for a full voyage build-up.

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

Turn an approved weather-dependent acceleration factor into a practical container-stack decision. Calculate tier-by-tier transverse force, overturning moment, windward uplift, leeward corner-post compression, lashing-rod tension, twistlock uplift and shear, racking demand and the weakest securing interface. Then solve the maximum stack weight that passes under the entered weather factor and compare it with unrestricted design conditions to estimate the additional stowage flexibility that calmer forecast conditions may unlock.

Wind-Assisted Propulsion ROI & Payback Calculator

Estimate wind-assisted propulsion fuel savings, payback, NPV and ROI for rotor sails, rigid sails, suction wings, kites and other WAPS technologies. Model route-weighted wind performance, auxiliary power, bunker price, carbon value, retrofit CAPEX, annual OPEX and optional FuelEU wind-reward reference values.

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 concepts against the vessel and route that must actually support them. Estimate route-averaged wind power, fuel and CO₂ savings, units required for a target saving, deck and air-draft impact, topweight effect, cargo interference, installation cost, payback and multi-year NPV.