单项选择题

A.chartplotterB.C-MAP NTC.C-CardsD.PPIThe（）has a built-……

The（）has a built-in world map; most areas are displayed on a scale of 4000 nm from the top to the bottom of the screen，and can be zoomed in to 150 nm.

A.chartplotter
B.C-MAP NT
C.C-Cards
D.PPI

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单项选择题Radar reflectors are required for（）.

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

单项选择题PPI is（）.

A.a plan-position indicator system
B.pulse-plan integration
C.pulse-pulse input
D.power-plan input

单项选择题Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.

A.one target
B.two targets
C.three targets
D.a large number of targets

单项选择题（）typically extends from close as 0.1 nautical miles out to 32 NM.

A.EBL
B.VRM
C.CRT
D.target tracking range

单项选择题（）is not used in modern radar.

A.EBL
B.VRM
C.CRT
D.Grease pencil