A.the center of the hydrodynamic forces acting on the underwater hull to resist the effect of the wind
B.the point of influence of wind on the ship
C.the pivot point
D.the point on the ship's above-water structure upon which the whole force of the wind can be considered an act
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A.turning ability deteriorates
B.virtual mass increases
C.the effect of the propeller transverse thrust on yaw alters
D.the ship will turn with its head towards the wind
A.obscured
B.darkened
C.greyed
D.delighted
A.Free of charge
B.Important
C.Required
D.Unnecessary
A.identification
B.distinction
C.discrimination
D.clearly seeing
A.Chain stopper
B.Devil's claw
C.Hawse ratchet
D.Riding pawl
最新試題
Which safety check（s）should be made before letting go the anchor（）.
When turning a ship in restricted space with a strong wind，it is normally best to（）.
All the following is true except that（）.
Pilotage in this country is（）.
A check line is（）.
When anchoring，good practice requires 5 to 7 fathoms of chain for each fathom of depth. In deep water you should use（）.
What is the best guide for determining the proper scope of anchor chain to use for anchoring in normal conditions（）.
A ship will always want to settle into a position where（）.
You are anchoring in 16 fathoms of water．On a small to medium size vessel，the（）.
You are underway in fog and you hear one prolonged blast followed by two short blasts.This is a vessel（）.