A.one short blast
B.one prolonged blast
C.two short blasts
您可能感興趣的試卷
你可能感興趣的試題
A.the assistant officer
B.the captain
C.the officer on duty
D.the third officer
A.Both vessels
B.Neither vessel
C.The stand-on vessel
D.The giving-way vessel
A.in numbers
B.with marks
C.in block letters
D.with s mbols
A.shallow water ahead of you
B.submerged wreck ahead of you
C.risk of collision imminent
D.A, B, C are all right
A.in
B.on
C.out
D.about
最新試題
（）is on the panel of radar.
Bales close to the deckhead should be covered to prevent（）.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
A tide is called diurnal when（）.
Full details of all lights and fog signals are shown on（）.
The mean draft of a ship is the draft（）.
According to the relevant regulation, lifeboat should be powered by（）.
The helm command PORT TWENTY means（）.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.