“Full speed ahead” and “Full speed astern” are ______ given by the officers or the pilots.

A.indicates the engine’s particulars

B.tells the engine’s function

C.shows the engine’s type

D.refers to the engine’s information

TO INCREASE THE DISTANCE TO THE VESSEL AHEAD BY REDUCING ONE′S OWN speed means ______．

A.Fall back

B.Keep low speed

C.Running after

D.Drop back

A.approach speed

B.bow thrust

C.transverse thrust

D.kick ahead

The bow thruster generally is ineffective at ______.

A.over 3 knots headway

B.at any speed astern

C.at any speed ahead

D.over 1 knot sternway

Please tell me ______ to reverse your engine from full ahead to full astern．

A.How length will it take

B.How long it will take

C.How long will it get

D.How much hours it will take

A.remain on course and hold speed

B.change course and put the stern to the wind

C.change course to put the wind on either beam and increase speed

D.remain on course but slack the speed

Emergency full ahead!

A.应急后退。

B.应急前进。

C.应急全速前进。

D.后退三。

A.remain on course and hold speed

B.remain on course but slack the speed

C.change course to put the wind on either beam and increase speed

D.change course and put the stern to the wind