Definition
In ATC phraseology, a word used to direct a pilot's attention to specific information, instructions, or a previously issued clearance, item, or document.
Plain English
When a controller says 'reference,' they are pointing the pilot to something specific — like an earlier instruction, a chart, or a published procedure — that the next part of the message relates to.
Context Anchor
Seen in FAA text, charts, procedures, and cockpit discussions when something is described in relation to a known point, value, or source.
Derivation
From the Latin referre, meaning 'to carry back' or 'refer to.' In aviation use, it carries the same idea: pointing the pilot back to a specific piece of information.
Why Pilots Care
Correct references prevent errors in takeoff speeds, landing distances, altitude assignments, and navigation fixes that directly affect safety margins.
Grounding Statement
A reference is the fixed or known thing that keeps your judgment from being a guess.
Intuition Check
Reference does not only mean a book, note, or person you consult. In FAA use, it often means the known point, value, or source used to compare, locate, verify, or decide something.
Example Sentence 1
Cessna 234, reference your earlier request, descent to 6,000 approved.
Example Sentence 2
Vref served as the reference landing speed for the approach, calculated from the aircraft's stall speed plus additives.