A.used
B.available
C.in use
D.can be used
您可能感興趣的試卷
你可能感興趣的試題
A.unwanted interference
B.unexpected figures
C.abnormal data
D.unwanted information
最新試題
When using a radar in a unstabilized mode，fixes are determined most easily from（）.
You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）
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（）.
Which procedure(s) shall be used to determine risk of collision? （）
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.
When you turn on the fast time constant (differentiator) control of a radar it will（）.
Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.
Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）
Radar reflectors are required for（）.
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（）.