A.reflect
B.shown
C.detected
D.defected
您可能感興趣的試卷
你可能感興趣的試題
A.A vessel on the starboard bow whose bearing is changing and range is decreasing
B.A vessel on the starboard bow whose bearing is steady and range is increasing
C.A vessel on the port bow whose bearing is steady and range is decreasing
D.A vessel on the port bow whose bearing is changing to the left and range decreasing
最新試題
An electronic depth finder operates on the principle that（）.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
A radar range to a small，charted object such as a light will provide a line of position in which form?（）.
A radar display in which North is always at the top of the screen is a(n)（）.
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 speed log indicates speed over ground（）.
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?（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
Deviation in a compass is caused by the（）.
A radar contact will remain stationary on a relative motion radar display only when it is（）.