单选题An emergence sea anchor may be constructed by type of extinguisher?（）.A a boat bucketB an air tank filled with waterC an oar and canvas weighted downD All of the above

if the anchor is secured firmly in sea bottom, what do you report?

The fluke angle of an anchor system is the angle between the ______.

A.flukes and the shank

B.shank and the sea bottom

C.mooring line and the sea bottom

D.flukes and the shackle

MOVING OF AN ANCHOR OVER THE SEA BOTTOM TO CONTROL THE MOVEMENT OF THE VESSEL defines ______.

A.Dredging ( of anchor )

B.Dragging ( of anchor )

C.Weighing anchor

D.Walking out anchor

An emergency sea anchor may be constructed by using ______.

A.a boat bucket

B.an air tank filled with water

C.an oar and canvas weighted down

D.All of the above

A sea anchor is ______.

A.a heavy anchor with an extra long line used to anchor in deep water

B.a cone shaped bag used to slow down the wind drift effect

C.a pad eye to which the sea painter is made fast

D.made of wood if it is of an approved type

When weighing anchor in a rough sea，how would you avoid risk of damaging the bow plating ________．

A.Heave it home as fast as you can

B.Heave it home intermittently，between swells

C.Leave the anchor under foot，until the vessel may be brought before the sea

D.Wait for a calm spot between seas，then house it

MOVING OF AN ANCHOR OVER THE SEA BOTTOM INVOLUNTARILY BECAUSE IT IS NO LONGER PREVENTING THE MOVEMENT OF THE VESSEL defines ______.

A.Dredging ( of anchor )

B.Dragging ( of anchor )

C.Weighing anchor

D.Walking out anchor