AVIANCA B787 Intercepted by Venezuelan Sukhois
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A military intercept a few years ago caused the target (a civilian ATR72 full of passengers) to perform numerous successive TCAS RA escape procedures for nearly 20 minutes!!
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Shows your age
By the way, the intercept transponder we had in those days (MASA, wasn't it ?) used to be designed to show on everybody screen, that this particular aircraft was on an Air Defence mission of primary importance - in other words, it was making the sky clear in front of you (what a feeling believe me, when climbing full burner, to be at FL 360 2' 20 sec after brakes release, knowing that nobody would be in your way except a possible bogey at the end ..)
So what would be the interest of switching off such a valuable signal ?
but I acknowledge people more proficient than me found the solution thereafter.
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Interesting. Happen to have a country of occurrence? Just curious.
Incident: TRIP AT42 at Tabatinga on Aug 7th 2011, TCAS RA and evasive maneouvers due to military intercept
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Brazil
DA50, you should investigate a little bit more the history of the Nobel Price, how it's decided, by which people, for which reasons...
The fact that it has been given to one president simply because he was black, after a year of doing nothing, simply because of his supposed potential, speaks volume. Now regarding Venezuela and Colombia, you should also investigate more...
Also civilian transponders have one mode, when military ones have 4 or even 5... so you don't switch them off like that - and when conducting an intercept, I'm sorry, but the supposed "Air Safety" of the intercepted one is not the main factor. Pretty obvious, not ? An ICAO "recommendation" with all the interference of lawyers we know, will never be considered for long by the generals in charge of Air Defence of any country.
Anyway, airlines pilots are not the ones in charge of designing the interception profiles or procedures, neither is civilian ATC. They are just here to obey and comply with the orders coming from the interceptors, otherwise they will get shot down, as it happened in more than one occasion in history. So if they enjoy playing with their TCAS or following it stupidly and blindly as they are usually instructed to do in their simulators, too bad for them.
There is no right or wrong in the debate, no idea of being legal or not, or gray area - just remember the ones in the back with 30 mm guns and missiles are right, final.
After landing you can fill as much paperwork as you want, it will go to the bin directly - it's not a lawyer office.
And if you are not convinced, just try to cross some areas in the world where you have nothing to do.
And even better, rather than talking between yourselves, try to discuss with some of your colleagues who have been doing the great job before, there are still a few of them remaining in the airlines cockpits.
Last edited by recceguy; 25th Oct 2016 at 20:29.
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Brazil. I found the article below on avherald. It was an ATR-42 not 72:
Incident: TRIP AT42 at Tabatinga on Aug 7th 2011, TCAS RA and evasive maneouvers due to military intercept
Incident: TRIP AT42 at Tabatinga on Aug 7th 2011, TCAS RA and evasive maneouvers due to military intercept
After about 17 minutes of evasive maneouvers, during which the aircraft climbed and descended between about 4500 and 12500 feet, numerous attempts to reach the other aircraft on radio frequency 121.5 MHz without any reply, it finally became clear the conflicting aircraft was a military aircraft intercepting them, after which the crew followed the other aircraft flying to their left wing tip and were guided towards Tabatinga, then the military pilot advised on 121.5 Mhz to proceed to land at Tabatinga.
