I have a Garmin Rino 650 that I take snowmobiling. Works great, battery lasts all day and then some. Can see your buddies location (if they have Rino's too).
Anyhow, if ever in an emergency situation which channel do I use in my Rino to try to communicate that emergency with outside world...
My brand new XM towed out again!!! Third issue with it. I'm done with Doo. They are playing catch up to Polaris and taking too many reliability risks.
Going to get me new Pro 163. Will save some $ and also save a LOT of weight.