A.She must use this equipment to obtain early warning of risk of collision
B.The use of a radar excuses a vessel from the need of a look-out
C.The radar equipment is only required to be used in restricted visibility
D.The safe speed of such a vessel will likely be greater than that of vessels without radar
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A.Radar ranges are less accurate in fog
B.Navigation buoys will always show up on radar
C.A sandy beach will show up clearer on radar than a rocky cliff
D.Small wooden boats may not show up on radar
A.It is more reliable than a fix based on radar bearings
B.It may be based on a single LOP or questionable data
C.When a 3-LOP fix plots in a triangle，the center of the triangle is the estimated position
D.It is usually based on soundings
A.Watching the compass bearing of an approaching vessel
B.Systematic observation of objects detected by radar
C.Long-range radar scanning
D.All of the above
A.Raising the antenna height increases the radar range
B.The ability of radar to detect objects is unaffected by weather conditions
C.Radar bearings are less accurate than radar ranges
D.Radar should be checked regularly during clear weather to ensure that it is operating properly
A.Serrated range rings
B.Indirect echoes
C.Multiple echoes
D.Blind sector
最新試題
Which statement about an estimated position is TRUE?（）
Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.
Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.
Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.
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（）.
When using the radar for navigating（）.
When using a radar in a unstabilized mode，fixes are determined most easily from（）.
PPI is（）.
Which statement concerning the operation of radar in fog is TRUE?（）
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（）.