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You receive a VHF DSC distress alert on channel 70 from a ship 2 NM away. A coast station acknowledges within 10 seconds. You should:
A
Immediately send a DSC distress alert relay
B
Listen on channel 16, avoid unnecessary traffic, prepare to assist, inform coast station/RCC if needed, log the event
C
Ignore the alert
D
Acknowledge by DSC yourself