Exactly. My aviation survival (PFD) vest has a dedicated pouch for the PLB. It was also equipped with a Marine VHF radio, laser flare, strobe light, signal mirror and a whistle.

30 miles off shore in the relatively warm gulf stream is still 30 miles off shore.

I got the idea to include a Marine VHF radio after reading a post here about a guy fishing in the gulf one minute and then suddenly in the water surrounded by stuff that had been in his boat. Fortunately his VHF radio was part of the stuff in the water and he was able to contact another fishing boat on Ch.16. IIRC he used a cooler for flotation.