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
When turning a ship in restricted space with a strong wind，it is normally best to（）.
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.
If a ship has sternway，with accommodation block aft，she may settle with the wind（）.
A check line is（）.
If the ship is alongside the wharf，what kind of（）is used?
The centre of lateral resistance is（）.
When entering the bridge，pilots of the Suez Canal want the master of the ship to fill in （）.
What effect is achieved from soaking an anchor（）．
A ship will always want to settle into a position where（）.
You are underway in fog and you hear one prolonged blast followed by two short blasts.This is a vessel（）.