On Friday, November 27, 2015 at 3:49:53 PM UTC-5, wrote:

Imagine two gliders flying in Utah at the nationals at 17,000 feet 100 knots indicated under cloud street on opposite courses. Say the 100 knots indicated is 134 knots true. Closure rate 268 knots or 496 kph, covering 2Km is about 1/4 a second warning. Just saying.

What is it that you think is going to go wrong in stealth mode? My reading of flarm's docs says alerts will be delivered normally, i.e. first warning about 25 seconds before closest approach.

T8