New multi-part AC for all-weather operations at aerodromes

Closes 12 Mar 2024

Opened 13 Feb 2024


We would like your feedback on the new draft multi-part advisory circular (AC) on all-weather operations (AWO) at aerodromes. This multi-part AC will replace existing AC 139-19 - All-weather operations on aerodromes and will complement AC 91-11 - Aeroplane low visibility operations - conduct and approvals.

An AWO involves an operation on an aerodrome (surface movement, take-off, departure, approach or landing) in conditions where visual reference is limited by weather conditions. AWOs include, but are not limited to, low visibility operations (LVO) and low visibility procedures (LVP). For example, an AWO involves aircraft departures from a non-controlled aerodrome, in reduced visibility, on a foggy day.

The purpose of this AC is to provide guidance and information to aerodrome operators and related service providers on best practices for managing all-weather operations, and for meeting legislative requirements. It expands on standards and guidance within Parts 139, 171 and 172 of the Civil Aviation Safety Regulations 1998 (CASR).

The new AC provides:

  • updated references to the Part 139 Manual of Standards (MOS) introduced in 2020
  • new guidance for operators of non-controlled aerodromes.

This AC will be of interest to:

  • aerodrome operators
  • aeronautical telecommunication service and radionavigation service providers
  • air traffic service providers
  • meteorological service providers
  • aircraft operators
  • pilots.

Why your views matter

Your feedback will help us make sure the proposed guidance is suitable, clear and will work as intended.

Documents for review

All documents related to this consultation are attached in the ‘Related’ section at the bottom of the overview page. They are:

  • Draft Multi-Part AC 139-05, AC 171-05 and AC 172-03 - v1.0
  • MS Word copy of online consultation for ease of distribution and feedback within your organisation.

Please submit your comments on the draft AC through the Consultation Hub using the survey provided. If you are unable to provide feedback this way, please contact us for advice through

Please read the AC document before providing your feedback.

What happens next

At the end of the response period, we will:

  • review all comments received
  • make responses publicly available on the consultation hub (unless you request your submission remain confidential)
  • publish a Summary of Consultation which summarises the feedback received and outlines any intended changes and next steps.

Feedback that improves the guidance will be incorporated into the final AC.

Give Us Your Views.


  • Aerodrome operator
  • Air operators
  • Air traffic service providers
  • Aviation Meteorology
  • Forecaster/Meteorological service provider
  • Certified aerodrome owner/operator
  • CASA aerodrome inspector
  • Aerodrome industry consultant


  • Airspace and infrastructure
  • Operational standards
  • Equipment standards