下列属于多义短语的是( )

A vessel is not underway when ______.

A.the anchor is dragging

B.the ahchor is used in docking

C.the ahchor is dredging

D.she is at anchor but yawing heavily

A.When at anchor, the pilot vessel is only required to sound anchor signals

B.The identification signal must be sounded any time the pilot vessel is underway

C.The pilot vessel may only sound the identity signal when making way

D.All of the above

Vessel underway means that a vessel is ().

A.On the way

B.At anchor

C.Made fast to a terminal

D.Moving against water

A pilot vessel on pilotage duty at night will show sidelights and a sternlight ______.

A.when at anchor

B.only when making way

C.at any time when underway

D.only when the identifying lights are not being shown

A marker pole，with a horseshoe buoy and a sea anchor attached，should be used to ______.

A.mark the position of a lost mooring

B.determine your vessel's sideslip underway

C.determine your speed through the water

D.indicate location of a man overboard

When a vessel is aground，().

A.She is underway

B.She is not underway

C.Whether she is underway cannot be determined

D.She might be or not be underway

By paying out more anchor cable, you ______.

A.decrease the holding power of your anchor

B.decrease the swing of your vessel while at anchor

C.increase the holding power of your anchor

D.increase the possibility that your vessel will drag anchor

If your radiotelephone fails while underway，______．

A.you must visually signal oncoming vessels

B.you must immediately tie up in the nearest port until the radiotelephone is repaired

C.you must anchor until the radiotelephone is repaired

D.the loss of the radiotelephone must be considered in navigating the vessel

Which vessel，when anchored at night，is NOT required to show anchor lights ().

A.A power-driven vessel

B.A vessel engaged on pilotage duty

C.A vessel dredging

D.A vessel restricted in her ability to maneuver

The easiest way to anchor a vessel in a current is to ().

A.Stem the current and make very slow headway when the anchor is dropped

B.Stem the current and be falling aft very slowly when the anchor is dropped

C.Stem the current and endeavor to make neither headway nor sternway when the anchor is dropped

D.Stop all headway through the water and keep the current astern when the anchor is dropped