Definition
Service C is the FAA's interphone communications network that links air traffic control facilities for the exchange of flight data, control instructions, and coordination messages between controllers. It is one of several lettered service categories in the National Airspace System's communications infrastructure used to pass information between ATC facilities such as towers, approach controls, and centers.
Plain English
A behind-the-scenes phone and data network that controllers use to talk to each other and pass flight information between control facilities.
Context Anchor
Seen in FAA acronym, abbreviation, and NOTAM contraction lists, and sometimes in short aviation notices where space is limited.
Derivation
SVCC is built from SVC, a common aviation shortening of service, plus the letter C. The extra C is not part of the word service; it identifies the C category or type of service being referenced.
Why Pilots Care
Pilots don't use Service C directly, but it's the channel controllers use to hand off flights, share clearance information, and coordinate traffic. Knowing it exists helps explain why your handoff to the next controller usually goes smoothly — your details have already been passed along.
Intuition Check
Do not read SVCC as Class C airspace by default. Here it means service C; the surrounding notice tells you what that service is.
Example Sentence 1
The center coordinated the handoff with the approach controller over Service C before issuing the descent clearance.
Example Sentence 2
SVCC appeared in the list of active contractions for the airport.