Definition
Structured training delivered while a person is performing the actual duties of a position, under the supervision of a qualified individual, using real equipment and real tasks rather than simulated or classroom exercises. In the air traffic control context, it is the phase in which a developmental controller works live traffic at a specific position while a certified instructor monitors and signs off on each performance step required for full certification on that position.
Plain English
Learning a job by doing the real job, with someone qualified standing right there to guide and check the work until the trainee can do it alone.
Context Anchor
Seen in discussions of air traffic control sectors, where a trainee may learn a sector position while working live traffic under supervision.
Derivation
The phrase comes from ordinary workplace language: “on the job” means while actually doing the work, not just studying it in a classroom. That helps here because the training happens in the real operating environment.
Why Pilots Care
Builds real-world decision-making and handling skills that cannot be fully replicated in a classroom, directly supporting safe operations.
Intuition Check
Do not read this as casual practice or unsupervised trial and error. In aviation use, on-the-job training means real work performed under qualified supervision.
Example Sentence 1
The new controller completed several weeks of on-the-job training at the arrival sector before being certified to work it without supervision.
Example Sentence 2
Instructors use on-the-job training to evaluate a pilot's ability to manage real traffic and weather during live flights.