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
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A.a plan-position indicator system
B.pulse-plan integration
C.pulse-pulse input
D.power-plan input
A.one target
B.two targets
C.three targets
D.a large number of targets
A.EBL
B.VRM
C.CRT
D.target tracking range
A.EBL
B.VRM
C.CRT
D.Grease pencil
A.To receive the high-frequency pulses from the transmitter
B.To focus the pulses into a beam，and send them into space
C.To pick up reflected pulses coming from objects that have been struck by the beam
D.To reflect microwaves
最新試題
Your radar displays your ship off center．As you proceed on your course， your ship’s marker moves on the PPI scope while echoes from land masses remain stationary.What is this display called（）.
Which condition indicates that your radar needs maintenance?（）
When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）
The development of（）led to the fully automatic ARPA systems installed on commercial ships.
You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）
Which statement about an estimated position is TRUE?（）
Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.
Which procedure(s) shall be used to determine risk of collision? （）
What provides little or no indication that a vessel is dragging anchor? （）