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> If a military aircraft shows up on that, it's because they want to be seen, for example as a show of force. There were B-52s doing orbits over Kabul during t

by rjsw 4y ago

> If a military aircraft shows up on that, it's because they want to be seen, for example as a show of force. There were B-52s doing orbits over Kabul during the evacuation with their transponders turned on.

JumpCrisscross 4y ago
> B-52s doing orbits over Kabul during the evacuation with their transponders turned on These transponders’ primary goal is preventing collisions. America never lost air superiority over Kabul. Keeping transponders on reduces the risk of collisions amid chaos at the cost of dialling up the non-existent risk of detection by Taliban SAMs.
- dboreham 4y ago
  Based on my Dad having worked on such a thing in the early 1960s, surely they have encrypted/spread-spectrum versions of such things?
  - oneplane 4y ago
    Perhaps, but that doesn't help with collision avoidance if commercial and private craft in the area do not.
  - JumpCrisscross 4y ago
    > surely they have encrypted/spread-spectrum versions of such things? Kabul’s airspace was a mess of civilian and military planes [1][2]. You want the Spanish A310 to know it’s barrelling towards a Superfortress. [1] https://en.m.wikipedia.org/wiki/2021_Kabul_airlift https://en.m.wikipedia.org/wiki/2021_Kabul_airlift [2] https://twitter.com/defencegeek/status/1427012384502292480?s=21 https://twitter.com/defencegeek/status/1427012384502292480?s...
    - remarkEon 4y ago
      Perhaps related [1]. In this case, these transmitters would have prevented the collision. It may seem crazy, but a collision with a large military aircraft out in the middle of nowhere has happened before. >Neither aircraft was equipped with TCAS collision avoidance systems, and although both crews had filed a flight plan, the German aircraft was not in contact with Namibian air traffic control and controllers were unaware of its presence in Namibian airspace. Furthermore, the Tupolev was flying at the wrong altitude, according to its flight plan and to the semicircular rule. [1] https://en.wikipedia.org/wiki/1997_Namibia_mid-air_collision https://en.wikipedia.org/wiki/1997_Namibia_mid-air_collision

by rjsw 4y ago

JumpCrisscross 4y ago

> B-52s doing orbits over Kabul during the evacuation with their transponders turned on These transponders’ primary goal is preventing collisions. America never lost air superiority over Kabul. Keeping transponders on reduces the risk of collisions amid chaos at the cost of dialling up the non-existent risk of detection by Taliban SAMs.

dboreham 4y ago
Based on my Dad having worked on such a thing in the early 1960s, surely they have encrypted/spread-spectrum versions of such things?
- oneplane 4y ago
  Perhaps, but that doesn't help with collision avoidance if commercial and private craft in the area do not.
- JumpCrisscross 4y ago
  > surely they have encrypted/spread-spectrum versions of such things? Kabul’s airspace was a mess of civilian and military planes [1][2]. You want the Spanish A310 to know it’s barrelling towards a Superfortress. [1] https://en.m.wikipedia.org/wiki/2021_Kabul_airlift https://en.m.wikipedia.org/wiki/2021_Kabul_airlift [2] https://twitter.com/defencegeek/status/1427012384502292480?s=21 https://twitter.com/defencegeek/status/1427012384502292480?s...
  - remarkEon 4y ago
    Perhaps related [1]. In this case, these transmitters would have prevented the collision. It may seem crazy, but a collision with a large military aircraft out in the middle of nowhere has happened before. >Neither aircraft was equipped with TCAS collision avoidance systems, and although both crews had filed a flight plan, the German aircraft was not in contact with Namibian air traffic control and controllers were unaware of its presence in Namibian airspace. Furthermore, the Tupolev was flying at the wrong altitude, according to its flight plan and to the semicircular rule. [1] https://en.wikipedia.org/wiki/1997_Namibia_mid-air_collision https://en.wikipedia.org/wiki/1997_Namibia_mid-air_collision