Deck General · Cargo Handling & Securing
A cargo boom or crane on a vessel is required to have a Safe Working Load (SWL) marked on it. This marking indicates:
- AThe weight of the boom itself
- BThe maximum load the gear is certified to lift under normal operating conditions✓ Correct
- CThe breaking strength of the cargo runner wire
- DThe minimum cargo load required for safe operation
Explanation
The SWL (Safe Working Load) is the maximum load that cargo handling gear is certified to lift safely. Exceeding the SWL risks structural failure of the boom, wire, or fittings. Under 46 CFR, SWL must be legibly marked and cargo gear must be tested and certified periodically.
Authority: 46 CFR
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