A.Water temperature
B.Climatology data
C.Speed of advance
D.Depth contours
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A.Soundings
B.Waypoints
C.Meteorological data
D.Radar targets
A.Radar targets
B.ARPA vectors
C.Hydrographic data
D.All of the above
A.beam
B.radar
C.light beacon
D.reflector
A.Straight line
B.Arc
C.Parabola
D.Hyperbola
A.relative display
B.composite display
C.stabilized display
D.unstabilized display
最新試題
What will NOT induce errors into a doppler sonar log?（）
The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.
Error may be introduced into a magnetic compass by（）.
A Doppler log in the bottom return mode indicates the（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
（）should be used during the poor visibility if the radar’s screen shows heavy sea returns.
How is variation indicated on a small-scale nautical chart?（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
Deviation in a compass is caused by the（）.
A radar contact will remain stationary on a relative motion radar display only when it is（）.