MATS Pt 1 SI 2021/04: Operating at the lower or upper limit of controlled airspace

Supplementary Instruction SI 2021/04 to the Manual of Air Traffic Services Part 1 was published on 29 October 2021, effective 27 January 2022.

The purpose of this Supplementary Instruction (SI) is to detail changes made to the Manual of Air Traffic Services (MATS) Part 1 (CAP 493) relating to aircraft operating at the lower or upper limit of controlled airspace.

SW2021/285