單項選擇題When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.

A.in the way
B.the way
C.by the way
D.through the path


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1.單項選擇題What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）

A.An acquired target entering into a guard zone
B.A tracked target lost for one radar scan
C.A tracked target entering your preset CPA-TCPA limits
D.A target being initially detected within a guard zone

2.單項選擇題What provides little or no indication that a vessel is dragging anchor? （）

A.Increasing radar range to a fixed object ahead
B.Drift lead with the line leading perpendicular to the centerline
C.Vibrations felt by placing a hand on the cable
D.Changing bearings to distant fixed objects abeam

3.單項選擇題What is TRUE when operating in fog and other vessels are detected by radar?（）.

A.You should make an ample change to port for a vessel crossing on the starboard bow
B.You should maneuver in ample time if a close-quarters situation is developing
C.You should determine the course and speed of all radar contacts at six minute intervals
D.Long-range scanning will provide early warning of ALL other vessels within the radar's range

4.單項選擇題What is TRUE of the history display of a target’s past positions on an ARPA?（）

A.It provides a graphic display to emphasize which vessel is on a collision course
B.In the true presentation，it provides a quick visual check to determine if a vessel has changed course
C.The display is one of the primary inputs and must be in use when using the trial maneuver capability
D.It provides a graphic display of a target vessel's relative course，speed，and CPA

5.單項選擇題Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the（）.

A.speed of the vessel over the ground or through the water
B.distance to the next port
C.time of the next navigational satellite pass
D.None of the above