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.<br>A:AIS<br>B:ECDIS<br>C:GPS<br>D:VDR

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

出自：海船船员证

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