Part 61 definitions
instrument approach operation means an approach and landing:
(a) conducted using instruments for navigation guidance; and
(b) based on an authorised instrument approach procedure.
instrument approach procedure means a series of predetermined manoeuvres by reference to flight instruments with specified protection from obstacles from the initial approach fix or, where applicable, from the beginning of a defined arrival route to a point from which a landing can be completed and thereafter, if a landing is not completed, to a position at which holding or en‑route obstacle clearance criteria apply.