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
Deviation is the angle between the（）.
A Doppler speed log indicates speed over ground（）.
Compass error is equal to the（）.
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
A barometer showing falling pressure indicates the approach of a（）.
What will NOT induce errors into a doppler sonar log?（）
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
An electronic depth finder operates on the principle that（）.
Deviation in a compass is caused by the（）.