A.on course
B.headed fair
C.holding on
D.in shape
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A.port and starboard strings
B.outer strings
C.drag strings
D.side strings
A.a mechanical breakdown on the tug
B.adverse tidal current conditions
C.the tug reducing its speed
D.All of the above
A.celestial meridian
B.celestial equator
C.celestial horizon
D.principal vertical circle
A.south celestial pole
B.north celestial pole
C.observer's meridian
D.Greenwich meridian
A.transmit the thrust of the engine to the propeller
B.transmit the thrust of the propeller to the vessel
C.absorb the shock of wave pressure at the bow
D.be placed between the engines and the foundation to absorb the vibration
最新試題
A slow rise in the barometric pressure forecasts（）.
A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
A tsunami is caused by a(n)（）.
A stage should only be rigged（）.
A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when（）.
A sufficient amount of chain must be veered when anchoring a vessel to ensure（）.
A tug is “in irons” when held in a fixed position by（）
A spanner is a （）.
A towline should be fastened to（）.
A tug may be in danger of tripping when（）.