单选题When anchoring a vessel under normal conditions，which scope of chain is recommended? （）A Four times the depth of waterB Two and one-half times the depth of waterC Five to seven times the depth of waterD Fifteen times the depth of water

Under normal weather and sea conditions when securing a stack of containers with twist locks，lashings are required when the tier exceeds what height?

A.Lashings are always required

B.One container

C.Two containers

D.Three containers

Under normal weather and sea conditions when securing a stack of containers with non-locking fittings，lashings are required when the tier exceeds what height ________．

A.Lashings are always required

B.One container

C.Two containers

D.Three containers

______is a precaution which contributes to avoiding trouble under normal operating conditions.

A.Constant inspection

B.Keeping constant load

C.Remaining constant temperature

D.Varying speed

You are anchoring in 16 fathoms of water．On a small to medium size vessel，the ______．

A.Anchor may be dropped from the hawse pipe

B.Anchor should be lowered to within 2 fathoms of the bottom before being dropped

C.Scope should always be at least ten times the depth of the water

D.Scope should always be less than 5 times the depth of the water

In determining the scope of cable to be used when anchoring, what would NOT be considered__________.

A.Depth of the water

B.Character of the holding ground

C.maintenance cost for the chain

D.Type of anchor cable

Off hire is when a vessel breaks down，strands，or has any damage that prevents the working of cargo or delays the sailing of the vessel．Under which of the following charter parties is off hire most likely to be mentioned？ ______.

A.Bareboat

B.Voyage

C.Time

D.Lease