Communicationsmedium#1285
When a SELCAL check is required, the pilot requests:
A
A radio check on 121.5
B
An HF frequency change
C
A new SELCAL code
D
ATC to transmit a SELCAL check using the aircraft's assigned code
CorrectExplanation
The pilot requests a SELCAL check by asking the ground station to transmit their code to verify the system is working, confirmed by the cockpit alert.
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