单选题When should the emergency position-indicating radiobeacon be activated after abandoning a ship?（）AImmediatelyBAfter one hourCOnly when another vessel is in sightDOnly after sunset
单选题
When should the emergency position-indicating radiobeacon be activated after abandoning a ship?（）
A
Immediately
B
After one hour
C
Only when another vessel is in sight
D
Only after sunset
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