ACARS communications are carried on which radio?

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Multiple Choice

ACARS communications are carried on which radio?

Explanation:
ACARS uses data-link communication over VHF, not voice channels. Aircraft normally have multiple VHF radios, with the first two reserved for voice traffic. A separate VHF data-link radio is dedicated to ACARS, typically the third VHF radio, so ACARS messages travel on VHF Data Link without interfering with voice communications. HF is used for long-range, oceanic voice when VHF coverage isn’t available, so it isn’t used for standard ACARS. That’s why ACARS communications are carried on the third VHF radio.

ACARS uses data-link communication over VHF, not voice channels. Aircraft normally have multiple VHF radios, with the first two reserved for voice traffic. A separate VHF data-link radio is dedicated to ACARS, typically the third VHF radio, so ACARS messages travel on VHF Data Link without interfering with voice communications. HF is used for long-range, oceanic voice when VHF coverage isn’t available, so it isn’t used for standard ACARS. That’s why ACARS communications are carried on the third VHF radio.

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