On a MODU, when may a work vest be substituted for a required life preserver?
Official USCG Answer & Rule Citation
Correct Answer: Option D — At no time
Work vests are designed for continuous comfort during routine deck operations and do not provide the head-support, turning characteristics, or thermal protection of a USCG-approved life preserver. Consequently, work vests may never be substituted for required life preservers.
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