Definition

Approach Speed Categorisation is system for differentiating aircraft based on the speed at which the aircraft is flown during the approach phase of flight. Fixed wing aircraft are assigned to one of five categories.

Description

Aircraft performance has a direct effect on the airspace and visibility required for the various manoeuvres associated with the conduct of an instrument approach procedure. The most significant performance factor is the aircraft speed.

Accordingly, a number of categories, each with a specified speed range, have been established. These categories provide a standardised basis for relating aircraft manoeuvrability and airspace requirements to specific instrument approach procedures. An aircraft type or variant thereof is normally assigned to a specific category.