Recommendation R20070026

Recommendation issued to: Airservices Australia

Recommendation details
Output No: R20070026
Date issued: 22 October 2007
Safety action status: Closed - Action Taken
Background: Why this Recommendation was developed

Output text

Safety Recommendation

The Australian Transport Safety Bureau recommends that Airservices Australia, in consultation with the Civil Aviation Safety Authority, review the requirements for the dissemination of SIGMET information with a view to minimising differences between air traffic control procedures contained in the Aeronautical Information Publication and those contained in ICAO Doc.4444 and ICAO Doc.7030.

Initial response
Date issued: 21 December 2007
Response from: Airservices Australia
Action status: Closed - Accepted
Response text:

The following information provides an update on actions taken to address the above Safety Recommendation.

Airservices' activity is occurring both internationally and domestically on this matter. We have corresponded with the Australian representative on APANPIRG and the ICAO office in Bangkok to begin research into the origin and practicality of applying the Doc 7030 two hour dissemination requirement. This research will look at possible alignment with Europe and North America. These regions do not currently specify a difference to Doc 4444 in this area.

Domestically, Airservices is working with CASA with regard to the SIGMET requirement. Within Airservices we are also examining the technical and practical feasibility of identifying aircraft operating, or planning to operate in the Australian FIR, that are two hours away from a SIGMET area. In addition we are considering what also could be done to enable two hour dissemination. Depending on the outcome of these activities, Airservices will develop an appropriate roll out strategy and implementation timeframe.

Further correspondence
Date issued: 11 November 2008
Response from: Airservices Australia
Response text:

I refer to the above recommendation regarding the difference between Airservices procedures relating to dissemination of SIGMET information and ICAO Doc 4444 and 7030. In essence, the difference related to a one hour requirement in the Airservices document and a two hour requirement in ICAO. The matter was also referred to in [Deleted] letter to you dated 21 December 2007.

I am pleased to advise that Airservices has implemented a change to the requirement which will be published in the Manual of Air Traffic Services (MATS) effective 20 November 2008. The new procedure states:

9-10-420 Aircraft to notify

Notify aircraft, at the time operational information and the existence of non-¬routine MET products are identified:

a. by directed transmission to those aircraft maintaining continuous communication and within one hour's flight time of the conditions (two hours in the case of SIGMET); and

b. where continuous communication is not required, by broadcasting on appropriate ATS frequencies to those aircraft that could be within one hour's flight time of the conditions (two hours in the case of SIGMET); and

c. by directed transmission to all affected aircraft engaged in SAR action.

Last update 05 April 2012