An Instrument Rating is issued for privileges within one of four specified Groups specified by CAS 421.46(1).   Commercial pilot students seeking to become airline pilots should obtain a Group 1 Instrument Rating.


The Group applicable to the rating is determined by the aircraft category and class in which the flight test for the rating is conducted:



Aircraft Category/Class used for Flight Test.



Group 1

Multi-engine Aeroplane


All Aeroplanes

Group 2

Multi-engine Centre-line thrust



All Multi-engine Centre-line thrust and Single-engine Aeroplanes


Group 3

Single-engine Aeroplanes



All Single-engine Aeroplanes


Group 4



All Helicopters.