Definition
A navigational fix, point, or intersection used by ATC as a shared reference for sequencing, separating, or coordinating two or more aircraft along converging or merging routes.
Plain English
A single point in the sky that two or more aircraft will pass over or near, which controllers use as a common yardstick to manage spacing between them.
Context Anchor
Seen in air traffic control and instrument flight discussions when aircraft routes cross, join, or are compared for spacing.
Derivation
From Latin communis, meaning 'shared' or 'belonging to all.' Here it carries that original sense — a point shared by more than one aircraft's route, used as a reference they have in common.
Why Pilots Care
Allows safe separation of aircraft on converging routes when radar coverage is unavailable.
Intuition Check
Do not read common point as just any familiar or ordinary place. In this context, it means a specific shared position on the routes of two or more aircraft.
Example Sentence 1
ATC used the VOR as a common point to sequence our arrival behind the traffic on the converging airway.
Example Sentence 2
Without radar, the pilots knew they would pass the common point at different altitudes for safety.