单选题The vessel on opposite course will（）on your port side.A passB overtakeC catch upD run down

Every vessel that is to keep out of the way of another vessel must take positive early action to comply with this obligation and must ______.

A.avoid crossing ahead of the other vessel

B.avoid passing astern of the other vessel

C.sound one prolonged blast to indicate compliance

D.alter course to port for a vessel on her port side

If the circumstance of the case admits, don’t alter course to port for a vessel on you own___.

A.starboard side

B.port side

C.stern

D.Head

--- Are you on your course? ---Reply: _________!

A.No, 2 degrees port off course

B.Course 020 degrees

C.Steady

D.OK

In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should ______.

A.stop your engines

B.sound the danger signal at two-minute intervals

C.hold course and speed until the other vessel is sighted

D.take avoiding action as soon as possible

If a sailing vessel with the wind on the port side sees a sailing vessel to windward and cannot tell weather the other vessel has the wind on the port or starboard side, she shall ______.

A.hold course and speed

B.sound the danger signal

C.keep out of the way of the other vessel

D.turn to port and come into the wind

If your vessel is the stand-on vessel in a crossing situation ______.

A.you must keep your course and speed

B.you may change course and speed as the other vessel must keep clear

C.the other vessel must keep her course and speed

D.both vessels must keep their course and speed

Your vessel is crossing a narrow channel．A vessel to port is within the channel and crossing your course．She is showing a black cylinder．What is your responsibility ________．

A.Hold your course and speed

B.Sound the danger signal

C.Begin an exchange of passing signals

D.Do not cross the channel if you might impede the other vessel