单项选择题

The direction in which a vessel is steered is the course. The path actually followed is the （）.

A.route
B.track
C.heading
D.course over the ground

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单项选择题

The direction a vessel is pointed at any given time is the（）.

A.course
B.track
C.heading
D.course over the ground

单项选择题

The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to（）.

A.a difference in water pressure
B.the method of breaking up the water stream
C.the length of the applicator
D.All of the above

单项选择题

The dew point is reached when the（）.

A.temperature of the air equals the temperature of the seawater
B.atmospheric pressure is 14.7 lbs. per square inch
C.relative humidity reaches 50%
D.air becomes saturated with water vapor