A.I am altering my course to starboard
B.I am altering my course to port
C.I am operating astern propulsion
D.I am operating ahead propulsion
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A.getting
B.to get
C.to have got
D.for getting
A.at
B.in
C.on
D.over
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
最新試題
Keep clear（）the buoy.
Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
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Which term describes a part of a natural fiber line?（）
Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.