Originally Posted by
rustle
RAF types are fitting Mode S / TCAS.
Them avoiding hitting you (because they see you on TCAS) saves as much pain as you avoiding hitting them
TCAS would enable them to see (AND AVOID) Mode S targets.
Catchy, but untrue.
The Tornado/Cessna crash (killing 4) would have been avoided if the FJ had TCAS and the Cessna had Mode S.
Or if the fast jet had had TCAS, and the Cessna had been squawking Mode C.
Mode S gives no improvement over Mode C for that purpose.