A.tug's engineroom or the bow
B.pilot house or aft steering station
C.forecastle
D.towing bitts by reaching over and releasing a lever
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A.on course
B.headed fair
C.holding on
D.in shape
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
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A time diagram is a diagram on the plane of the（）.
A slow，gradual fall of the barometer indicates approaching（）.
A thrust block is designed to（）.
A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when（）.
A storm’s track is characterized by all of the following except（）.
A special daymark is a（）.
A stretch where the channel changes from one side of the river to the other is called a （）.
A towing vessel’s fire detection system may be certified to comply with the Coast Guard’s towing vessel fire protection regulations by（）.
A tug may be in danger of tripping when（）.
A twin-screw vessel with a single rudder is making headway. The engines are full speed ahead. There is no wind or current. Which statement is FALSE? （）