单项选择题
A.person aboard B.person working on deck C.crew member D.None of the above are correct
Deck foam systems，designed to protect cargo areas on ta...
单项选择题Deck foam systems，designed to protect cargo areas on tankers built after January 1，1975，must have a supply of foam-producing material to operate the system at its designed rate of foam production for（）.
A.15 minutes without recharging B.20 minutes without recharging C.25 minutes without recharging D.30 minutes without recharging
Cable tension for catenary calculations is taken at the...
单项选择题Cable tension for catenary calculations is taken at the（）.
A.chain locker B.fairlead C.anchor D.contact point of chain with seabed
By regulation，life preservers aboard an uninspected tow...
单项选择题By regulation，life preservers aboard an uninspected towing vessel must be（）.
A.readily accessible B.securely stowed C.stored in sealed containers D.stowed with the emergency provisions
