The Nautilus UW GPS/Radio sounds good and is cheap in comparison to true PLB's but the range of a tiny low-watt GPS Radio with an antenna that is going to be basically at water level is minimal (3-4 miles at best) and for it to be of any value there needs to be a boat with a marine radio in range of receiving it that has emergency GPS decoding built in that is turned on and that has someone is listening to it. That's a lot of limitations that in my opinion render the tiny hand held Nautilus GPS/Radio and others almost worthless as a rescue device.
Dave I believe said that he was able to communicate with his VHF base station in town from quite a ways away. I think it would hit his and some other elevated towers, like the Navy and the cruise ships. So, not worthless. Not a PLB by any means though.
My personal experience was I sent my flooded one back for replacement. The company is somehow part of or owned bt the aggressor fleet people up there in Canada. I was sitting at home watching tv when my cell phone rang. It was the US Coast Guard in Puget Sound. They called to ask about why my Lifeline was activated. They said it was lighting up all the emergency receivers in both the US Coast Guard and the Canadians. I told them it was in for repair and they asked if there was anything I could do as it was VERY annoying. I found an emergency contact for the Aggressor fleet and called. They told me it was on the bench, in a building in town and they would send someone to stop it.
So hey, the signal is alot better than you think.
Guess nobody remembers Dave's review of the Nautilus Lifeline:
6 left on Amazon Body Glove (Nautilus) Lifeline Handheld VHF Radio with GPS
If I were you I would not pay a dime for them. I just threw the last 4 flooded ones we had away. They cannot keep a seal and why do you think Nautilus is discontinuing them. I called and asked them if they could replace them under warranty—NOT.
Dave Dillehay
Aldora Divers
True they stopped making the one I have. And it was replaced once for flooding too. Now I just don't open it except in the dry to charge it. And the charge lasts for ever. I like having a VHF portable so I have more options than just pushing the BIG RED button on a PLB.
As I said before, I would use the VHF pretty quick if I was left floating. I think I would wait around quite a bit for the boat before hitting the PLB. That being said, I am thinking of getting a PLB too. You CANNOT have enough gear.
If my current one floods, I won't replace it as the new one is ONLY a VHF emergency beacon without voice. At that point it is a PLB without the range.