[contingencies]

For numerous technical reasons, ADS-B itself is not suitable for low-flying small UAS. Technical reasons include but are not limited to the following:

- Lack of support for the 1090 MHz ADS-B channel on any consumer handheld devices

- Cost, Size, Weight and Power (CSWaP) requirements of ADS-B transponders on CSWaP constrained UA

- Limited bandwidth of both uplink and downlink, which would likely be saturated by large numbers of UAS, endangering manned aviation

Understanding these technical shortcomings, regulators worldwide have ruled out the use of ADS-B for the small UAS for which UAS RID and DRIP are intended.

https://www.ietf.org/archive/id/draft-ietf-drip-arch-31.html

[FL410]

That’s dumb. ADSB is the standard for aviation now. Make it work on drones, don’t try and make some new standard. Pretty sure uAvionix had already solved this way back in 2015 when I was in the industry.