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Joined 1 year ago
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Cake day: July 4th, 2023

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  • Let me add some context from the perspective of an airline pilot who is also is a company training captain.

    All modern transport category aircraft are equipped with a system called TCAS, or Terminal Collision Avoidance System.

    TCAS operates by interrogating the TCAS system of other aircraft in a defined proximity ring based on some variables like altitude and rate of closure and resolves a climb/descend/level command to each aircraft, which we pilots train regularly to execute. The system is a near perfect solution to deconfliction when collision is probable.

    With daily average flights in the US alone around 45 000, the amount of “near misses” is an incredibly small percentage. In 15 years of flying TCAS equipped aircraft, I’ve had 5 actual TCAS RAs (RA stands for resolution advisory - the actual avoidance maneuver)

    Another way to look at it is: when was the last mid-air collision in the US, or even the world involving TCAS equipped airliners? The only one that comes to mind is the DHL-BAL mid air in 2002, which was a result of the one crew not following the TCAS instruction.

    This article can fuck right off.



  • Not sure where a list of all variations would be, but there may be something out there. Lots of companies can have similar subtypes, as fins change airlines frequently, be it by lease or sale. I flew the 767 for 4 years, and my company flight summary has about 6 different 767-300 variations broken down. We got our fins from all over the place, we had fins from Hawaiian to Ethiopian.


  • It denotes the variation to the specific fin when it was ordered from the manufacturer. For example, if an airlines wants to use its 777-300 type for a domestic market and needs a smaller center fuel tank to make room for baggage and cargo, that configuration would have a different model subtype number, such as 777-3xx.