单项选择题
A.is used mostly by towing vessels B.has a maximum depth of 14 feet (4.3 meters) at MHW C.West Gap has a controlling depth of 24 feet D.is entered through the East Gap or the West Gap
One method of controlling rats on vessels is by rat-pro...
单项选择题One method of controlling rats on vessels is by rat-proofing. Rat-proofing is accomplished by （）.
A.installing rat guards on the mooring lines when in port B.keeping foods protected and avoiding the accumulation of garbage C.eliminating possible living spaces for rats when the ship is constructed D.trapping and/or poisoning the rats
Multi-year ice is the hardest sea ice and should be avo...
单项选择题Multi-year ice is the hardest sea ice and should be avoided if possible. It is recognizable because of what tone to its surface color? （）
A.Greenish B.Bluish C.Grey D.Grey-white
In order to benefit from the use of storm oil in heavy ...
单项选择题In order to benefit from the use of storm oil in heavy seas，the storm oil should be spread （）.
A.around the rudder and screws B.completely around the vessel C.to leeward of the vessel D.to windward of the vessel
