單項(xiàng)選擇題Which effect does speed through the water have on a vessel which is underway in shallow water ().

A.A decrease in the speed results in a decrease in steering response and maneuverability
B.An increase in speed results in the stern sucking down lower than the Bow
C.An increase in speed results in the vessel rising on an even plane
D.A decrease in speed results in the vessel sucking down on an even plane


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1.單項(xiàng)選擇題When liquid is free to move transversely in a tank,the effect is called().

A.free communication
B.free density
C.free surface
D.negative GM

2.單項(xiàng)選擇題The term of Landfall means().

A.Land first sighted when vessel approaching from seaward
B.Land last sighted when vessel leaving from a port
C.In sight of one another when vessel underway
D.In sight of an island during a ship on her voyage

3.單項(xiàng)選擇題Preferred channel marks are colored with().

A.black and green bands
B.red and green bands
C.red and yellow bands
D.yellow and green bands

4.單項(xiàng)選擇題Preferred channel marks are aids to navigation which all following marks other than().

A.channel junctions
B.bifurcations
C.fishing traps
D.wrecks or obstructions

5.單項(xiàng)選擇題In the absence of a route leading from seaward,the conventional direction of buoyage generally follows().

A.an anti-clockwise direction around land masses
B.a clockwise direction around land masses
C.an anticlockwise direction around sea masses
D.a clockwise direction around sea masses