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Home > Air Safety > About mid-air collision and avoidance
About mid-air collision and avoidance
Aviation - Air Safety
Saturday, 21 May 2011 05:47

TCAS Alert

Dear Captain Lim,

I would like to ask you several questions in regards to air safety. I will try to ask the questions directly and to the point as possible. I am planning a holiday to Malaysia and beyond and I want to clear my mind of all these risk factors surrounding the flight.

My first question is "Does air traffic control in Australia monitors flight for international destination such as Malaysia and if they do, for how far until the other air traffic control partner takes over and vice versa?"

My other question is in regards to a stigma that have plagued some aircraft which I've seen and read about on the internet, like the 'Mid-air collision' which happened over Europe and similarly elsewhere as well, with the concluded findings that there were instructional discrepancies between the pilots and Air Traffic Controllers (ATC) on the ground.

I know that most modern aircraft have an on board 'Traffic Collision Avoidance System' (TCAS), could you please explain more about this and also the risks involved with it.

I like to thank you in advance in regards to all these questions, and hope to hear the "Answers" back from you very soon.

Ken


Boeing 777 TCAS

Hi Ken,

Australian ATC monitors air traffic up to their FIR (Flight Information Region) – that is 267 nautical miles (307 statute miles) south east of Bali if you are flying on that particular Airway (A576). Thereafter, the air traffic is handed over to the next region, Bali. Singapore would then take over somewhere 150 nm  south east of the island before handing over final control to Kuala Lumpur, Malaysia

The mid air collision over Europe was the result of the human error in that the crew followed the ATC instructions rather than the TCAS command (see video below)

About 2 years ago, I wrote about the TCAS system here.

Hope that clarifies your mind that pilots are trained to follow TCAS instructions today regardless of ATC instructions from the ground.

PS. To check for any latest updates or postings, please follow my new Twitter at @CaptKHLim


2002 Mid Air Collision

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