Definition
A digital communication link used in aviation to exchange information between aircraft and ground systems (such as air traffic control, airline operations, or weather services) as data messages rather than voice transmissions.
Plain English
A digital connection that lets aircraft and people on the ground send messages back and forth as text or data, instead of talking over the radio.
Context Anchor
You may see ADL in aviation abbreviation lists, avionics descriptions, communications procedures, or systems that exchange messages between the aircraft and the ground.
Derivation
‘Aeronautical’ comes from the Greek roots for ‘air’ and ‘sailing,’ meaning anything related to flight. ‘Data-link’ simply means a connection that carries data. Together: a data connection used in aviation.
Why Pilots Care
Datalink reduces radio congestion, lowers the chance of misheard clearances, and delivers things like weather and clearances directly to the cockpit in readable form. In oceanic and remote airspace, it is often the primary way pilots communicate with controllers.
Analogy
It is similar to receiving a text message instead of a phone call, but the message is for aviation use and may affect flight decisions.
Example Sentence 1
Before departure, the crew received their oceanic clearance over the aeronautical data-link rather than by HF radio.
Example Sentence 2
Flight plan amendments arrived through the aeronautical data-link.