Re Stroud's remarks on PLB, I'll save you the trouble of looking it up in the book, having just read it. He tried a PLB in Belize and got no response. For this reason (and for certain financial considerations, no doubt), in his book, he promotes SPOT as more effective than a PLB.

Since SPOT's operators call 911, I wouldn't expect it to be too effective in Belize, either. You can't get help from people who aren't organized to provide it.