Originally Posted by
RatherBeFlying
As we saw here, ATC can fall short and altitudes can be missed. An ADS-B display is a valuable backstop - for a small fraction of the cost of TCAS.
Recall that the accident Blackhawk flight crew likely had a Stratus 2S onboard that could have provided ADS-B traffic info via the flight crew’s Army-issued EFBs loaded with ForeFlight. There is no evidence from the Blackhawk CVR (or the aircraft’s flight path) that this feature was used.
As I recall from the interviews, there was no Army aviation policy about how this technology was to be used during DC area flights. Some crews used it, but most did not.