Published date: 27 April 2007


This Advisory Circular (AC) describes an acceptable means of compliance with Civil Aviation Rule Part 139 Aerodromes Certification, Operation and Use. In relation to the aerodrome design standards for the obstacle limitation surfaces.


This AC is intended for the holder of an aerodrome operating certificate issued under Part 139 and any other aerodrome operator who promulgates aerodrome data and information in the aeronautical information publication (AIP).

Related rules

This AC relates specifically to CAR Part 139, Rule 139.51, Aerodrome Design Requirements, Clause (a)(2) obstacle limitation surfaces.

Change notice

Revision 1 alters a number of references to other Advisory Circulars in this document. This is to reflect the new numbering of those ACs in line with a project to standardise the numbering of all ACs. This AC has also been re-formatted.