46 U.S.C. § 8102: Watchmen

The owner, charterer, or managing operator of a vessel carrying passengers during the nighttime shall keep a suitable number of watchmen in the vicinity of the cabins or staterooms and on each deck to guard against and give alarm in case of a fire or other danger. An owner, charterer, or managing operator failing to provide watchmen required by this section is liable to the United States Government for a civil penalty of $1,000. The owner, charterer, managing operator, agent, master, or individual in charge of a fish processing vessel of more than 100 gross tons as measured under section 14502 of this title , or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title shall keep a suitable number of watchmen trained in firefighting on board when hotwork is being done to guard against and give alarm in case of a fire.