Definition
A NADA is a communications device within the FAA's National Airspace Data Interchange Network (NADIN) that gathers, or 'concentrates,' multiple streams of aeronautical data traffic — such as flight plans, weather messages, and NOTAMs — and routes them through the NADIN system between FAA facilities.
Plain English
It's a piece of FAA network equipment that funnels lots of separate aviation messages onto one shared data line so they can travel between air traffic facilities efficiently.
Context Anchor
Seen in FAA acronym and NOTAM contraction lists, system references, or discussions of how aviation notice data moves through FAA networks. Pilots normally do not operate it directly.
Derivation
Concentrator' comes from Latin 'concentrare,' meaning to bring together at a center. In networking, a concentrator is a device that pulls many small data streams together into one larger stream — which is exactly what a NADA does for FAA aeronautical messages.
Why Pilots Care
Pilots don't operate this equipment, but it's part of the plumbing that delivers their filed flight plans, weather briefings, and NOTAMs. Knowing the term means a pilot won't be thrown off if it appears in FAA documentation.
Analogy
An ADIN concentrator is like a mail-sorting point: information comes in from connected places, gets gathered at one point, and is then sent onward through the larger system.
Intuition Check
Do not read NADA here as the everyday word meaning “nothing.” In this FAA context, NADA refers to an ADIN concentrator, which is part of the data system used to move aviation notice information.
Example Sentence 1
The FAA technician explained that the flight plan data passes through a NADA before reaching the destination ARTCC.
Example Sentence 2
Technicians verified that the NADA — ADIN concentrator was online before sending updated navigation data.