A.Soundings
B.Waypoints
C.Meteorological data
D.Radar targets
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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
A.unstabilized display
B.stabilized display
C.composition display
D.relative display
最新試題
A Doppler log in the bottom return mode indicates the（）.
An electronic depth finder operates on the principle that（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
What will NOT induce errors into a doppler sonar log?（）
（）the canal transit，the radar was operating.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
Deviation is the angle between the（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
Compass deviation is caused by（）.