单项选择题
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
To determine if risk of collision exists，a vessel which...
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
The shoreline along Rocky Point should give a good rada...
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
The radio waves used for radar are very short，only（）lon...
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
