Definition
The radio communications service that supports aircraft while they are flying between airports, primarily on airways or in en route airspace. ECOM provides the voice link between pilots and Air Route Traffic Control Centers (ARTCCs) and is used for clearances, traffic advisories, position reports, and routine coordination during the cruise portion of a flight.
Plain English
The radio service pilots use to talk to controllers while flying between airports, away from the takeoff and landing phases.
Context Anchor
Seen in FAA abbreviation lists, flight planning material, NOTAM contractions, and discussions of communications used during the middle part of a flight.
Derivation
‘En route’ comes from French, meaning ‘on the way.’ It describes the phase of flight after departure and before arrival — the part where the airplane is simply travelling from A to B. ECOM is the communications service that covers that phase.
Why Pilots Care
Knowing which communication service applies to the current phase of flight helps the pilot select the right frequency and expect the right kind of service. ECOM is the link to Center controllers during cruise, which is where most of the flight typically happens.
Intuition Check
‘En route communications’ does not mean any radio call made in flight. It refers specifically to the service used during the cruise phase between airports — not tower, ground, or approach communications.
Example Sentence 1
Once clear of the terminal area, the pilot switched to the Center frequency and used ECOM to receive traffic advisories during cruise.
Example Sentence 2
ECOM frequencies are listed on the en route chart for each center sector.