单项选择题
A.distance B.largeness C.diameter D.measurerment
What is required to launch a boat stowed in a crescent ...
单项选择题What is required to launch a boat stowed in a crescent davit?（）
A.Hoist the boat clear of the cradle B.Release the outboard part of the cradle C.Rig the tricing lines D.Crank the crescent out
What is normally used to pass a mooring line to a dock?...
单项选择题What is normally used to pass a mooring line to a dock?（）
A.Distance line B.Gantline C.Heaving line D.Tag line
What happens to the efficiency of an anchor when it is ...
单项选择题What happens to the efficiency of an anchor when it is moved from sand to mud?（）
A.The efficiency increases B.The efficiency decreases C.The efficiency remains the same D.The efficiency cannot be determined.
