A.with
B.to
C.for
D.of
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A.should not be made
B.are not to be taken
C.should be taken
D.shall be made
A.used
B.available
C.in use
D.can be used
A.unwanted interference
B.unexpected figures
C.abnormal data
D.unwanted information
最新試題
Your ARPA has been tracking a target and has generated the targets course and speed.The radar did not receive a target echo on its last two scans due to the weather.What should you expect under these circumstances（）.
Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.
Your ARPA has automatic speed inputs from the log．Due to currents，the log is indicating a faster speed than the speed over the ground.What should you expect under these circumstances（）.
When using a radar in a unstabilized mode，fixes are determined most easily from（）.
The development of（）led to the fully automatic ARPA systems installed on commercial ships.
PPI is（）.
When navigating in thick fog with the radar on，you should（）.
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? （）
Which general statement concerning radar is FALSE?（）.
When you turn on the fast time constant (differentiator) control of a radar it will（）.