Hi Mary.
Yes, you are quite right in your decode of the acronyms.
An ELT is usually fitted to the aircraft and a PLB usually hangs around your neck on a lanyard. (You have to register a PLB, so they know who it is, when it's activated.)
I bought a PLB a couple of years ago (from one of the well known avionics companies you can find advertising on the back pages of most GA magazines) for a trip abroad in an SEP, and I now carry it around with me all the time.
Here's some details, and a great video about it's use.
http://www.gps.co.uk/fastfind-220-pl...p-89-300-1280/
MJ
