A.at
B.in
C.on
D.over
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A.a blast of from five to seven seconds' duration
B.a blast of from five to six seconds' duration
C.a blast of from four to six seconds' duration
D.a blast of from six to seven seconds' duration
A.at
B.for
C.in
D.on
A.on
B.by
C.in
D.for
A.stop down
B.speed down
C.slow down
D.down slow
A.SOS，ZZZ，XXX
B.SOS，UUU，SSS
C.SOS，XXX，TTT
D.SOS，TTT，UUU
最新試題
I hope you don’t mind（）the radar for us in a short time.
Which method of adjusting mooring lines is MOST useful for leaving a boat free to rise and fall with the tide?（）
In the International Code of signals，a group of three letters indicates（）.
Which mooring line has the least elasticity?（）
The ship will be（）demurrage soon.
Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.
Which mooring line is likely to undergo the most strain when docking a ship under normal conditions?（）
In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
Which tool is used to open the strands of fiber lines when making an eye splice?（）
Which statement is TRUE about nylon line?（）