Anyone tried to use this?
My quick sample identified that it requires the callsign but it has to be the a/c registration - that will possibly create confusion etc. not just for the police/SAR/HEMS/corporate/pipeline/etc. but also the ATC controller who is aware of G-$$$$ but then hears Police/Helimed etc.
You also have to select the zone that you require to transit - then ADD it before being allowed to submit.