A.soft clay
B.hard mud
C.very soft mud
D.sand
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A.in many places a counter current flows in opposition to the main current close to the bank
B.current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the wind
C.as speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructions
D.when close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces
A.the pivot point and point of influence of wind in are not in alignment
B.the pivot point and point of influence of wind in are in alignment
C.the point of influence of wind moves depending on the profile of the ship presented to the wind
D.the ship steams slowly in rough seas
A.A safety line attached to a man working over the side
B.Used to measure water depth
C.Used to slow the headway of a barge
D.Used to measure the overhead height of a bridge
A.great circle
B.small circle
C.large circle
D.general circle
A.anchoring in the Mediterranean
B.docking stern to a berth
C.docking bow to a berth
D.anchoring in a strong current
最新試題
Pilotage in this country is（）.
If the winch should fail while you are hauling in the anchor，what prevents the anchor cable from running out（）.
Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.
You are planning to anchor in an area where several anchors have been lost due to fouling.As a precaution，you should（）.
You are mooring to a buoy．You should approach the buoy with the current from（）.
You are entering port and have been instructed to anchor，as your berth is not yet available.You are on a SW’ly heading，preparing to drop anchor，when you observe the range lights as shown on your starboard beam.You should（）.
When anchoring，good practice requires 5 to 7 fathoms of chain for each fathom of depth. In deep water you should use（）.
If the ship is alongside the wharf，what kind of（）is used?
That（）is not caused by shallow water.
You are underway in fog and you hear one prolonged blast followed by two short blasts.This is a vessel（）.