For signaling, I have also considered obtaining a BaoFeng UV-5R
or BaoFeng UV-3R
. The 3R is tiny and would be very packable, even in a small belt kit. An EPIRB/PLB is out of my price range right now.
Both are available from sources on Amazon and elsewhere. Also, I have read that you want to be sure and get the brand name USB programming cable (about another $10). You can download Open-Source 3rd-Party programming software from various sources. I need to read more, but I believe the 3R also has a low-power switch that drops the power so it is legal for an unlicensed user to transmit (but I'm not 100% sure on the matter).