Definition
The FAA service responsible for coordinating the use of airspace blocks reserved for special operations — typically large formations, military movements, or other flights that need exclusive use of a defined chunk of airspace at specific altitudes and times. CARF approves, schedules, and de-conflicts these airspace reservations across the National Airspace System.
Plain English
A central FAA office that books and coordinates temporary 'reserved' chunks of airspace so that special flights — like military formations or large movements — can use that airspace without conflicting with normal traffic.
Context Anchor
You may see CARF in flight planning or air traffic control coordination when an operation needs an altitude reservation instead of normal shared use of the airspace.
Derivation
Altitude Reservation' literally means setting aside a slice of airspace at certain altitudes for a defined period. 'Central' indicates that one national-level function handles this coordination rather than each facility doing it independently.
Why Pilots Care
Civilian pilots rarely contact CARF directly, but its work is why temporary airspace reservations show up on flight planning briefings. Knowing CARF exists explains why some routes or altitudes are unavailable at certain times.
Grounding Statement
When CARF approves an altitude reservation, a defined slice of airspace is treated as reserved for that operation during the approved time.
Intuition Check
A reservation here is not like booking a seat on an airline. It means approved use of a defined part of the airspace for a set time, with other traffic kept clear as needed.
Example Sentence 1
The military formation flight was coordinated through CARF, which reserved a block of airspace along the route for the duration of the mission.
Example Sentence 2
CARF approved the altitude block for the upcoming military training mission.