Definition
In NOTAMs and aviation shorthand, REP is a contraction for 'report,' used to indicate either a required pilot transmission to ATC or a written notice such as a pilot report (PIREP) or inspection report.
Plain English
REP is a short way of writing 'report.' It can refer to something a pilot has to tell ATC, or to a written summary of conditions or observations.
Context Anchor
Seen in aviation notices, message contractions, and written operational instructions where space is limited.
Derivation
Report comes from Latin words meaning “to carry back.” That fits the aviation use: a pilot or operator carries information back to someone who needs it.
Why Pilots Care
When a clearance or NOTAM uses REP, the pilot is expected to either make a specific transmission (such as 'report passing 5,000') or be aware of a written notice that may affect the flight. Missing or ignoring it can mean a missed instruction or missed safety information.
Intuition Check
Do not read report here as a school paper or long written document. In aviation, a report can be a short operational update given by voice or in writing.
Example Sentence 1
The clearance read 'REP reaching 8,000,' so the pilot called ATC the moment the altimeter showed eight thousand feet.
Example Sentence 2
The pilot made a position REP giving altitude and estimated time of arrival.