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
（）the canal transit，the radar was operating.
An ECDIS is required to display which information?（）
Error may be introduced into a magnetic compass by（）.
Compass deviation is caused by（）.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
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?（）.
A Doppler log in the bottom return mode indicates the（）.
An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes?（）.
A Doppler speed log indicates speed over ground（）.