单项选择题
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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相关考题
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单项选择题
To determine if risk of collision exists，a vessel which is fitted with radar must use（）.
A.radar scanning
B.radar plotting
C.compass bearings
D.All of the above -
单项选择题
The shoreline along Rocky Point should give a good radar return because（）.
A.the shore is bluff and rocky
B.of offshore exposed rocks
C.submerged reefs cause prominent breakers
D.the lookout tower is marked with radar reflectors -
单项选择题
The radio waves used for radar are very short，only（）long.
A.a few centimeters
B.a few fathoms
C.a few meters
D.a few feet
