A vessel's fire control plan shall do which ofthe following?

Correct Answer: Option D — have a duplicate set of plans permanently stored outside the deck house.

SOLAS Chapter II-2 and 46 CFR regulations mandate that a duplicate set of fire control plans must be permanently stored in a prominently marked weather-tight enclosure outside the deckhouse. This ensures shore-side firefighters can readily access critical vessel layout and firefighting system data during an emergency.