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

SOLAS II-1/3-13 • MSC.1/Circ.1663 • SWL at Radius • Port Proof Load • Five-Year Retest • Annual Thorough Examination • Loose Gear

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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Need much more depth? Click Advanced above.Advanced adds certified load-chart interpolation, dynamic-equivalent demand, hoist-rope line pull, sheave resultant, brake holding, suspended-load moment, loose-gear proof loads, transition certification and cost.

Fast10 primary inputs

Core answerLift capacity + 2026 survey chain

Proof loadIMO table only for port/sheltered use

Lift & Statutory Quick Screen

Use the certified SWL at the actual working radius and operating condition. SWL is a certified static load, not a generic dynamic lifting allowance.

SOLAS II-1/3-13 applicability basis

Installation basis

Operating / proof-test environment

Payload / lifted objectt.

Hook block + spreader + loose geart suspended below the appliance.

Working radiusm.

Certified SWL at this radiust from approved load chart / certificate.

Months since last thorough examinationAnnual / 12-monthly screen.

Months since last lifting-appliance load testRetest at least once every five years.

Major repair / modification since last load test

SOLAS Applicability & 2026 Transition Basis

Appliance type

SOLAS II-1/3-13 applicability basis

Installation basis

Operating environment

First renewal survey on/after 1 Jan 2026

II-1/3-13 certification / legacy evidence status

Transition logic: pre-2026 lifting appliances are to be tested, thoroughly examined and brought into the II-1/3-13 certification framework no later than the first renewal survey on or after 1 January 2026. A valid pre-2026 test/thorough-examination certificate under another international instrument acceptable to the Administration may be considered compliant.

Lift, Radius & Certified Load Chart

Payload / lifted objectt.

Hook block + spreader + loose geart.

Working radiusm.

Exact certified SWL override at current radiust. Enter exact certified chart value if known. 0 uses screening interpolation.

Operational dynamic-equivalent factorEngineering screening only, not an IMO universal factor.

Sidelead / heel / operating multiplierUse approved engineering basis only.

Enter certified radius/SWL points. The tool never extrapolates. Linear interpolation is shown only as a screening value unless the certified load chart permits it.

Point	Radius m	Certified SWL t

Proof Load, Hoist Rope, Sheave & Brake Screen

Approved open-sea test loadt. Required only for open-sea appliances; Administration / recognized class value.

Hoist rope parts of line

Reeving efficiency%.

Hoist rope minimum breaking loadkN.

Allowable rope MBL utilization screen%. Maker/class/project criterion.

Included angle between rope legs at sheavedegrees. Resultant = 2T cos(angle/2).

Required brake holding factor× static working line pull, maker/class criterion.

Available hoist brake holding forcekN at rope/drum equivalent.

Approved suspended-load moment screenkN·m. 0 disables. Does not represent full boom/foundation analysis.

Loose Gear Proof-Test Register

MSC.1/Circ.1663 table 2 proof-test formulas are applied by gear type. Gear names remain on screen only and are excluded from Tool Data.

Gear	Type	Qty	SWL t each	Proof evidence	Months since exam	Major repair since proof	Manual proof t

2026 Survey, Examination & Condition Status

Months since last thorough examination12-monthly/annual screen.

Months since last lifting-appliance load testRetest at least once every five years.

Major repair / modification since load test

Latest competent-person condition

SWL permanently and clearly markedVariable-radius appliances display permissible loads / load chart to operator. SWL documentary evidence onboardCertificate or approved basis supports the marked SWL. Register of ship's lifting appliances currentTest and thorough-examination evidence is traceable onboard. Rigging plan / block list available where applicableCorrect reeving and loose-gear positions are documented. Maintenance manual / inspection regime availableManufacturer or competent-third-party basis addresses maintenance and replaceable components. Inspection, maintenance & operational-test records currentCorrosion, wire rope, brakes, hydraulics, safety devices and supporting structure are covered. Operator qualified, familiarized & authorizedOperations manual, limitations, communication and safe work procedures are understood. Current competent-person certificate availableLoad-test/thorough-examination or annual examination evidence is immediately available.

Survey / Repair Cost Context

Load-test contractor / test-weight cost

Class / competent-person survey cost

Rigging / loose-gear service cost

Expected repair / steel / hydraulic cost

Out-of-service hours

Vessel / operation value per hourselected currency/hour.

Similar lifting appliances onboard

Engineering / compliance screening only: this tool is not an approved crane load chart, structural or foundation analysis, wire-rope discard assessment, class approval, competent-person examination or authorization to conduct a proof load test. Use the actual certified SWL/load chart, Administration or recognized-class requirements, manufacturer manuals and an approved test procedure.

2026 basis: SOLAS II-1/3-13 entered into force on 1 January 2026. It covers lifting appliances, anchor handling winches and associated loose gear, with stated exclusions and Administration discretion for lifting appliances below 1,000 kg SWL. MSC.1/Circ.1663, reissued in January 2026 incorporating Corr.1, defines SWL as the maximum static load at a specified radius for the certified operating condition. For lifting appliances used in port or sheltered waters, table 1 minimum test loads are 1.25 × SWL for SWL ≤20 t, SWL + 5 t for 20 t < SWL ≤50 t, and 1.10 × SWL for SWL >50 t. Open-sea test loads are set to the satisfaction of the Administration or recognized class considering dynamic loads. Lifting appliances should be retested at least once every five years and thoroughly examined after any load test and annually.

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