默认题库 - 雷达及ARPA的使用

A. the radar reflectors reflect better signals
B. fog horn signals travel farther to sea
C. it is equipped with strobe lights
D. it has a reduced watch circle

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单选题

The common way to obtain your ship’s position is（）.

A. keeping a close watch and lookout
B. taking a radar range and bearing
C. observing a radar target and listening to signals
D. keeping a well clear cautio

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单选题

Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the（）.

A. speed of the vessel over the ground or through the water
B. distance to the next port
C. time of the next navigational satellite pass
D. None of the above

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单选题

When using a radar in a unstabilized mode，fixes are determined most easily from（）.

A. center bearings
B. tangent bearings
C. ranges
D. objects that are close aboard

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单选题

Which statement concerning the operation of radar in fog is TRUE?（）

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

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单选题

Which statement is true concerning a vessel equipped with operational radar?（）.

A. The Master of the vessel must be on the bridge when the radar is in use
B. The radar equipment is only required to be used in restricted visibility
C. The use of a radar excuses a vessel from the need of a look-out
D. This equipment must be used to obtain early warning of risk of collisio

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