A.sweep introduction
B.sweep interest
C.sweep intention
D.sweep intensity
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A.all fishing vessels over 39 feet in length
B.sail-propelled fishing vessels
C.all fishing vessels of less than 200 GT
D.wooden hull fishing vessels with a poor radar echo
A.in dense fog
B.in boisterous weather
C.in the open sea
D.in rivers
A.incorrect image
B.distinctive image
C.pictorial image
D.pictographic image
A.with
B.to
C.for
D.of
A.should not be made
B.are not to be taken
C.should be taken
D.shall be made
最新試題
Which statement concerning the operation of radar in fog is TRUE?（）
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（）.
Which statement is true concerning a vessel equipped with operational radar?（）.
Which condition indicates that your radar needs maintenance?（）
Which procedure(s) shall be used to determine risk of collision? （）
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（）.
You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）
PPI is（）.
You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later，the contact is 8 miles directly astern of you. What is the estimated speed of the contact? （）
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.