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
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A slow rise in the barometric pressure forecasts（）.
A tsunami is caused by a(n)（）.
A time diagram is a diagram on the plane of the（）.
A stand-on vessel is（）.
A vertex of the navigational triangle is NOT located at the（）.
A tug is “in irons” when held in a fixed position by（）
A tug in irons is（）.
A strong，often violent，northerly wind occurring on the Pacific coast of Mexico，particularly during the colder months，is called（）.
A towline should be fastened to（）.
A towing vessel’s fire detection system may be certified to comply with the Coast Guard’s towing vessel fire protection regulations by（）.