A.unwanted interference
B.unexpected figures
C.abnormal data
D.unwanted information
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A.Starting with a dash and extending radially outward from the target
B.As a broken line from center of PPI to the target
C.Starting with a dot and extending radially inward from the target
D.Starting with a dash and extending to the right of the target
A.Increase the radar gain to pick up weak echoes through the rain
B.Increase the STC setting to reduce close-in spurious signals
C.Navigate as though the effective range of the radar has been reduced
D.Increase the range of the inner and outer guard rings
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
A.Set and drift of the current
B.Relative track information
C.Predicted time of CPA
D.Initial range of acquisition
A.Dead in the water
B.1 knot
C.10 knots
D.15 knots
A.chartplotter
B.C-MAP NT
C.C-Cards
D.PPI
A.Serrated range rings
B.Indirect echoes
C.Multiple echoes
D.Blind sector
A.EBL
B.VRM
C.CRT
D.Grease pencil
A.enhance weak target echoes and brighten them on the PPI
B.reduce clutter over the entire PPI by shortening the echoes
C.only suppress weak targets to a limited distance from the ship (sea clutter)
D.reduce the beam width to provide a map-like presentation for navigation
A.Relative
B.TRUE
C.Compass
D.Magnetic
最新試題
You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）
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? （）
The development of（）led to the fully automatic ARPA systems installed on commercial ships.
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 general statement concerning radar is FALSE?（）.
Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.
（）typically extends from close as 0.1 nautical miles out to 32 NM.
Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.
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（）.