Deck Equipment — Winches, Capstans, Windlasses: Cargo Gear and Launching Appliance Controls

TL;DR — The SWL must be marked on the heel of every cargo boom, crane, or derrick; all associated loose gear must be rated to match; visual inspection is required monthly, and a proof load test biennially. Winch control apparatus on launching appliances must be examined quarterly, including drainage checks.

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What the Rule Says

Safe Working Load (SWL) Marking and Cargo Gear

The regulations governing cargo gear on commercial vessels establish a clear hierarchy of requirements that every deck officer must know cold. 46 CFR §28.885

Marking requirements. The safe working load for the assembled gear must be marked on the heel of each cargo boom, crane, or derrick. The marking must be in contrasting colors to the background and the letters and figures must be at least one inch in height. The SWL represents the load the gear is approved to lift, and critically, that figure excludes the weight of the gear itself. 46 CFR §28.885

This distinction — SWL excludes the weight of the gear — is a frequent exam trap. The rated capacity is the net payload, not the gross load on the structure.

Loose gear compatibility. All wire rope, chains, rings, hooks, links, shackles, swivels, blocks, and any other loose gear used or intended to be used in cargo loading or unloading must be commensurable with the SWL rating of the assembled gear. You cannot rig a 5-ton SWL boom with shackles rated for 2 tons. Every component in the system must be rated to support the marked SWL. 46 CFR §28.885

Monthly visual inspection. All loose gear used in cargo operations must be visually inspected by the vessel's captain or the captain's designee at frequent intervals, and in any event not less than once in each operating month. The responsibility rests with the master — it cannot simply be delegated and forgotten. The master or a designated person must actually conduct the inspection. 46 CFR §28.885

Biennial proof load test. In addition to the monthly visual inspection, a thorough examination and proof load test must be performed every second year (biennially). The proof load applied must be at a minimum of the SWL rating. The test must be performed and witnessed by competent personnel. The procedure requires that the proof load be lifted using the ship's normal tackle with the boom or derrick at the lowest practicable angle. Once the load has been lifted, it must be swung as far as possible in both directions. 46 CFR §28.885

Recordkeeping. After satisfactory completion of both the visual inspections and the biennial proof load test, all results and notations together with the date and location of each must be maintained and made available to Coast Guard representatives upon request. There is no grace period and no informal recordkeeping — the documentation must be available on demand. 46 CFR §28.885

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Winch Control Apparatus on Launching Appliances

A separate and distinct inspection regime applies to winch controls associated with launching appliances — the davit and winch systems used to deploy survival craft and rescue boats. 46 CFR §185.724

Quarterly examination. Each winch control apparatus of a launching appliance on a vessel, including motor controllers, emergency switches, master switches, and limit switches, must be examined once in each three months. The quarterly interval is fixed — it is not "at least annually" or "semi-annually." 46 CFR §185.724

Drainage check required. The quarterly examination must include the removal of drain plugs and the opening of drain valves to confirm that enclosures are free of water. Water intrusion into electrical control enclosures is a known failure mode for launching appliance winches, and the regulation specifically mandates this check as part of the quarterly examination. 46 CFR §185.724

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Deck Rails, Lifelines, and Hand Grabs in the Context of Deck Equipment Operations

Deck equipment operations — including winch and capstan work — take place on weather decks where personnel protection requirements apply. Two parallel sets of regulations address this, one for commercial fishing vessels and one for other vessels. 46 CFR §28.410 46 CFR §28.810

Height requirement. Deck rails, lifelines, or bulwarks must be at least 39 inches (1 meter) in height from the deck. A lesser height may be substituted only where the standard height would interfere with the normal operation of the vessel. 46 CFR §28.410 46 CFR §28.810

Stanchion spacing. All deck rails or lifelines must be permanently supported by stanchions at intervals of not more than 7 feet (2.3 meters). Stanchions must be through bolted or welded to the deck — not simply clamped or lashed. 46 CFR §28.410 46 CFR §28.810

Course spacing. Deck rails or lifelines must consist of evenly spaced courses. The spacing between courses must not exceed 15 inches (0.38 meters). The opening below the lowest course must not exceed 9 inches (0.23 meters). Lower courses are not required where the space below the upper rail is fitted with a bulwark, chain link fencing, wire mesh, or equivalent. 46 CFR §28.410 46 CFR §28.810

Portable stanchions. Portable stanchions and lifelines may be installed where permanently installed deck rails would impede normal fishing operations or emergency recovery operations (under §28.410) or normal cargo operations or emergency recovery operations (under §28.810). 46 CFR §28.410 46 CFR §28.810

Storm rails and hand grabs. A suitable storm rail or hand grab must be installed where necessary in a passageway, at a deckhouse side, at a ladder, and at a hatch where an individual might have normal access. 46 CFR §28.410 46 CFR §28.810

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Personal Protective Equipment During Deck Equipment Operations

When working around cargo gear, winches, and rigging, specific PPE requirements apply. Deck PPE includes a hardhat during cargo or rigging operations, ANSI-rated work boots with non-slip soles, a high-visibility vest, gloves appropriate to the task (cut-resistant for wire, leather for line), and hearing protection where engine or compressor noise exceeds 85 dB. USCG Boatswain Manual Ch. 4 §4.1

The single most-cited fault in small-vessel deck-injury reports is loss of footing on a wet deck. Non-slip surface treatment, handholds at every traffic point, and clear stowage of lines and gear are the primary risk-reduction measures. USCG Boatswain Manual Ch. 4 §4.3

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Why It Matters on the Exam

OUPV and Master 100 GT written exams test deck equipment knowledge in several predictable ways:

Inspection intervals are a primary target. Examiners frequently present answer choices that mix up the monthly visual inspection, the quarterly winch control examination, and the biennial proof load test. Know which interval applies to which requirement and which piece of equipment. Cargo gear loose gear: monthly visual inspection by the master or designee. Launching appliance winch controls: quarterly examination including drainage check. Cargo gear assembled gear: biennial proof load test at minimum SWL. 46 CFR §28.885 46 CFR §185.724

SWL definition is tested directly. Questions will ask what the SWL marking on a cargo boom represents. The correct answer is the load the gear is approved to lift, excluding the weight of the gear itself. 46 CFR §28.885

Location of SWL marking. The SWL is marked on the heel of the cargo boom, crane, or derrick — not on the winch drum, not on the wire rope, not on the hook. 46 CFR §28.885

Proof load test procedure details. The boom or derrick must be at the lowest practicable angle during the proof load test, and the load must be swung as far as possible in both directions. These procedural specifics appear in exam questions. 46 CFR §28.885

Deck rail dimensions. The 39-inch minimum height, 7-foot maximum stanchion spacing, 15-inch maximum course spacing, and 9-inch maximum opening below the lowest course are all testable numbers. 46 CFR §28.410 46 CFR §28.810

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Common Pitfalls

Confusing the inspection intervals. Monthly, quarterly, and biennial are three distinct intervals applying to three distinct requirements. Candidates who memorize only "inspect cargo gear regularly" will miss questions that require the specific interval. 46 CFR §28.885 46 CFR §185.724

Misidentifying who conducts the monthly inspection. The monthly visual inspection of loose cargo gear must be conducted by the vessel's captain or the captain's designee. It is not an engineer's responsibility, not a port authority function, and not a classification society requirement. 46 CFR §28.885

Forgetting the drainage check in the quarterly winch examination. The quarterly examination of launching appliance winch controls is not simply a functional test of switches. It specifically requires removal of drain plugs and opening of drain valves to verify enclosures are free of water. 46 CFR §185.724

Treating SWL as a gross load figure. The SWL excludes the weight of the gear itself. If a boom is marked 5 tons SWL, the maximum net payload is 5 tons — the weight of the hook, block, and wire is not subtracted from that figure to arrive at the cargo weight. 46 CFR §28.885

Confusing portable vs. permanent stanchion rules. Portable stanchions are permitted only where permanently installed rails would impede normal operations or emergency recovery. They are not a general substitute for permanent installation. 46 CFR §28.410 46 CFR §28.810

Ignoring the marking specifications. The SWL marking must be in contrasting colors and at least one inch in height. A marking that is present but illegible or undersized does not satisfy the regulation. 46 CFR §28.885

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Quick Check

Q1: Where must the SWL be marked on a cargo boom, and what does that figure represent?

The SWL must be marked on the heel of the cargo boom, crane, or derrick, in contrasting colors and at least one inch in height. The SWL represents the load the gear is approved to lift, excluding the weight of the gear itself. 46 CFR §28.885

Q2: How often must loose cargo gear (wire rope, shackles, hooks, etc.) be visually inspected, and who is responsible?

Loose cargo gear must be visually inspected at frequent intervals, and in any event not less than once in each operating month. The inspection must be conducted by the vessel's captain or the captain's designee. 46 CFR §28.885

Q3: What is the required frequency of the proof load test for cargo gear, and what is the minimum load applied?

A biennial (every second year) thorough examination and proof load test is required. The proof load applied must be at a minimum of the SWL rating. The test must be witnessed by competent personnel, conducted with the boom or derrick at the lowest practicable angle, and the load must be swung as far as possible in both directions. 46 CFR §28.885

Q4: How often must winch control apparatus on a launching appliance be examined, and what does that examination include?

Each winch control apparatus of a launching appliance — including motor controllers, emergency switches, master switches, and limit switches — must be examined once in each three months (quarterly). The examination must include removal of drain plugs and opening of drain valves to verify that enclosures are free of water. 46 CFR §185.724

Q5: What are the minimum height, maximum stanchion spacing, maximum course spacing, and maximum opening below the lowest course for deck rails or lifelines?

Minimum height: 39 inches (1 meter). Maximum stanchion spacing: 7 feet (2.3 meters). Maximum spacing between courses: 15 inches (0.38 meters). Maximum opening below the lowest course: 9 inches (0.23 meters). Stanchions must be through bolted or welded to the deck. 46 CFR §28.410 46 CFR §28.810

Q6: What PPE is required during cargo or rigging operations on deck, and at what noise level is hearing protection required?

Required PPE during cargo or rigging operations includes a hardhat, ANSI-rated work boots with non-slip soles, a high-visibility vest, and gloves appropriate to the task (cut-resistant for wire, leather for line). Hearing protection is required where engine or compressor noise exceeds 85 dB. USCG Boatswain Manual Ch. 4 §4.1

Q7: What is the single most-cited fault in small-vessel deck-injury reports?

Loss of footing on a wet deck. Non-slip surface treatment, handholds at every traffic point, and clear stowage of lines and gear are the primary risk-reduction measures identified. USCG Boatswain Manual Ch. 4 §4.3