Coordination FIX

Definition

A geographic point, identified on aeronautical charts, that air traffic controllers use as a common reference when transferring control of an aircraft from one ATC facility or sector to another. The aircraft is expected to be at a specified altitude, route, and sometimes time as it crosses this point, allowing the receiving controller to accept it cleanly.

Plain English

A specific point on a chart where one air traffic controller hands an aircraft off to the next controller. Both controllers agree in advance how the aircraft will be flying when it reaches that point.

Context Anchor

Seen mostly in ATC procedures, IFR route planning, and materials that describe how aircraft move from one controller or control area to another.

Derivation

Coordination comes from Latin co- (together) and ordinare (to arrange in order) — literally arranging things together. A fix in aviation is a defined geographic point. So a coordination fix is the point where two ATC facilities arrange the handoff together.

Why Pilots Care

Ensures safe and efficient transfer of aircraft between controllers without gaps in separation.

Intuition Check

Do not read fix as repair. In aviation, a fix is a known point in the sky or on a route, and a coordination fix is that point used for ATC coordination.

Example Sentence 1

ATC instructed the pilot to cross the coordination fix at 10,000 feet before being handed off to the next center.

Example Sentence 2

Controllers timed the aircraft to cross the coordination fix at the agreed altitude.

Definition

A fix used by air traffic controllers to hand off control of an aircraft from one controller or facility to another. The aircraft's position, altitude, and timing relative to this fix form the basis of the transfer, ensuring both controllers share the same reference point for the handoff.

Plain English

A specific point in the sky that two controllers agree to use as the marker for passing an aircraft from one to the other. When the aircraft reaches that point, control changes hands.

Context Anchor

Seen in air traffic control procedures, route descriptions, and glossary material dealing with handoffs, control transfer, and clearance limits.

Derivation

Coordination comes from the Latin co- (together) and ordinare (to arrange in order). A coordination fix is literally the point where two controllers arrange things together — the shared reference where the handoff is organized.

Why Pilots Care

Proper use keeps the handoff seamless, maintains required separation, and prevents delays or communication gaps.

Intuition Check