A.the best fix is obtained by using a tangent bearing and a range
B.and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearings
C.and using ranges，the most rapidly changing range should be measured last
D.and crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart
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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.The target vessel's generated course and speed are based solely on radar inputs
B.Navigational constraints may require a target vessel to change course
C.The trial maneuver feature will automatically determine a course that will clear all targets
D.You cannot determine if a small target has been lost due to sea return
A.center bearings
B.tangent bearings
C.ranges
D.objects that are close aboard
A.station the look-out in the wheelhouse to keep a continuous watch on the radar
B.secure the sounding of fog signals until a vessel closes within five miles
C.station a look-out as low down and far forward as possible
D.keep the radar on the shortest available range for early detection of approaching vessels
A.in the way
B.the way
C.by the way
D.through the path
最新試題
What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）
What provides little or no indication that a vessel is dragging anchor? （）
When you turn on the fast time constant (differentiator) control of a radar it will（）.
Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.
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（）.
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.
Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）
Which condition indicates that your radar needs maintenance?（）
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（）.
When using the radar for navigating（）.