Cold Temperature Corrections to Minimum Sector Altitudes (MSAs) and ATC Surveillance Minimum Altitude (ATCSMA) Chart Altitudes

This IN supersedes IN-2013/020 of the same title which has now expired, and is reissued with a new IN reference number as the content remains valid.

In July 2012 the UK CAA concluded an external consultation with industry on the subject of cold temperature corrections to MSAs and ATCSMA Chart altitudes, and the full Comment Response document can be found on the CAA website. This IN provides further details on the key consultation themes and a reminder to pilots regarding altitudes issued by ATC.