单选题Given the same water depth and line tension，the holding power of a 19 pound/foot wire rope mooring system in comparison to the holding power of a 90 pound/foot chain mooring system will be（）.A weakerB equalC greaterD indeterminable

The height of tide is the ______.

A.depth of water at a specific time due to tidal effect

B.difference between the depth of the water and the area's tidal datum

C.difference between the depth of the water and the high water tidal level

D.difference between the depth of the water at high tide and the depth of the water at low tide

The major components which determine the length of catenary in a deployed anchor cable are water depth，cable tension，and ______.

A.environmental forces

B.bottom conditions

C.cable weight

D.water density

Mooring winch should be equipped with mechanical brakes which are capable of holding ______.

A.half the breaking strength of the mooring line

B.the full breaking strength of the mooring line

C.the maximum expected tension of the mooring line

D.50% over the working tension of the mooring line

In determining the scope of anchor line to pay out when anchoring a small boat, one must consider the ______.

A.charted depth of water only

B.depth of water, including tidal differences

C.time and date of anchoring

D.type of anchor being used

All echo-sounders can measure the ______．

A.Actual depth of water

B.Actual depth of water below keel

C.Average depth from waterline to hard bottom

D.Average depth of water to soft bottom

A liferaft which has inflated bottom-up on the water ______.

A.should be righted by standing on the carbon dioxide cylinder，holding the righting straps and leaning backwards

B.should be righted by standing on the life line，holding the righting straps leaning backwards

C.will right itself when the canopy tube inflates

D.must be cleared of the buoyant equipment before it will right itself

Air gap is the vertical distance between the bottom of the hull and the ______．

A.Still water level

B.Wave crest

C.Wave crest plus the charted water depth and tidal corrections

D.Wave crest plus the charted water depth and tidal correction and storm surge

The certificate of inspection of a vessel will specify the ______.

A.number of licensed personnel required on board

B.maximum load line draft

C.maximum water depth for drilling

D.next date for an inclining experiment

Given the same water depth and line tension, the holding power of a 19 pound / foot wire rope mooring system in comparison to the holding power of a 90 pound / foot chain mooring system will be ______.

A.weaker

B.equal

C.greater

D.Indeterminable