3 ms·
It's hard to know what that is. TCAS is a great example of an obvious solution to mid-air collisions - two devices seamlessly negotiate for one plane to go up,
by YPPH 3y ago
It's hard to know what that is. TCAS is a great example of an obvious solution to mid-air collisions - two devices seamlessly negotiate for one plane to go up, the other to go down.
One I can think of is an electronic runway "lock". ATC mark the runway as locked to a particular aircraft. The landing aircraft checks at minimums whether if the runway is locked to any other aircraft. It's harder to know how to prevent incursions at ground level, but it could be a beacon near the runway threshold and intersecting taxiways, flashing a warning in the cockpit of the taxing aircraft if an aircraft on final holds the lock. A pilot could still disregard it. Sometimes two planes can share the same runway, such as a plane lining up while another vacates, which adds further problems.
I'm not aware of any system like this.
- tjohns 3y agoRunway Status Lights (RWSL) are close to what you're describing. If surface surveillance radar detects that a runway is occupied, it turns on red warning lights at the runway approach end and at the hold-short bars. The nice thing is that the entire system is ground-based, no additional equipment needed in the aircraft. However, it's complicated/expensive, so only a handful of airports have it installed. https://en.wikipedia.org/wiki/Runway_status_lights https://en.wikipedia.org/wiki/Runway_status_lights
- YPPH 3y agoYou're right. Regrettably, I just read that Haneda is one of the handful that have it, but the system was broken. A great example of how an aircraft accident is almost always a result of multiple things going wrong. https://abcnews.go.com/International/japan-airlines-flight-crew-acknowledged-repeated-permission-land/story?id=106066266 https://abcnews.go.com/International/japan-airlines-flight-c...