Had an Air Cell ST 3100 in my PC-12. Worked flawlessly. Suggest that you be sure to integrate it with the pilot's audio panel so that calls can be made/received through your headset. Have a GlobalStar GSP 1600 in my helo. Cant recommend this as GlobalStar has some problems with their satellites which results in limited capability until sometime in 2010 (they say). About to change this out for an Iridium unit.