![]() Such navaids have a class code W (without), e.g. No voice or underlined frequency indicates ATC can't use this navaid for to transmit voice messages. Should attempt to reestablish communications by ![]() In addition to monitoring the NAVAID voice feature, the pilot Two-way Radio Communications Failure, 6-4-3. Pilot has also instruction to use NAV receivers, e.g. It may also be used to transmit ATIS when no communication emergencies are going on. The voice feature is present on all navaids, except TACAN. Broadcast clearances through any available means of communications With voice capability, FSS, Aeronautical Radio Incorporated (ARINC),ī. Not be limited to, emergency frequencies, NAVAIDs that are equipped Reestablish communications with the aircraft. In the event of lost communications with an aircraft under yourĬontrol jurisdiction use all appropriate means available to ![]() Information provided to ATCO by FAA in JO 7110.65:Ī. In that case this is a one way communication, as NAV aboard the aircraft have no transmitting capability. However ATC may try to send additional information and new clearances using the NAV radios. When COM transceivers fail, the pilot is left without information from ATC, and will follow their current flight plan and clearances. Navigation receivers can be used as a fall back for regular VHF/HF radio transceiversīefore data links, there were essentially two types of radio receivers in the flight deck, and this is still the case for most GA aircraft: "COM" used for voice communication, and "NAV" used to receive navigation signals.
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