单项选择题
A.DCU B.UTC C.ENC D.MENU
The（）transmits own ship data cyclically via two defined...
单项选择题The（）transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems.
A.AIS B.ECDIS C.GPS D.VDR
Radar makes the most accurate determination of the（）.A....
单项选择题Radar makes the most accurate determination of the（）.
A.direction of a target B.distance to a target C.size of a target D.shape of a target
Most modern Loran-C receivers，when not tracking properl...
单项选择题Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
A.Bell alarm to warn the user B.Lighted alarm signal to warn the user C.Alternate signal keying system D.View finder for each station
