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單項選擇題

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

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單項選擇題

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

單項選擇題

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