Definition
A secondary radio communications system used by air traffic control facilities to maintain pilot-controller voice contact when the primary communications equipment fails. BUEC sites are remote transmitter and receiver locations that provide redundant frequency coverage so controllers can continue working aircraft during outages of the main system.
Plain English
A backup radio setup that controllers switch to if their main radios stop working, so they can still talk to pilots.
Context Anchor
Seen in FAA acronym and abbreviation lists, and possibly in preflight or facility information related to emergency communication capability.
Why Pilots Care
If primary ATC communications fail, controllers may shift to BUEC frequencies. Pilots who understand this know that a brief comms hiccup or a frequency change request during an outage is part of a planned backup procedure, not a lost-comms emergency.
Grounding Statement
Think of BUEC as the backup path for an emergency message when the normal path is blocked.
Intuition Check
BUEC does not mean a separate emergency by itself. It refers to the backup communication capability used for an emergency situation.
Example Sentence 1
When the primary transmitter went offline, the center shifted traffic to the BUEC site to keep talking with airborne aircraft.
Example Sentence 2
Controllers may instruct pilots to switch to BUEC frequencies in areas with known communication blackouts.