On an OSV, when may a work vest be substituted for a required life jacket?
Official USCG Answer & Rule Citation
Correct Answer: Option D — At no time
Work vests are designed for comfort and mobility during routine tasks but do not provide the buoyancy, head support, or thermal protection required of a USCG-approved life jacket. Therefore, 46 CFR strictly prohibits substituting a work vest for a required life jacket under any operational or emergency condition.
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