单选题Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations，vessels and aircraft? （）AVessel's typeBVessel's courseCNavigational statusDAll of the above
单选题
Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations，vessels and aircraft? （）
A
Vessel's type
B
Vessel's course
C
Navigational status
D
All of the above
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