B Sousa
Although an ELT is registered to aircraft or vessel, a portable 406 Mhz PLB is registered to an individual. I carry the following satellite PLB on every flight (you can use almost any third-party GPS to upload your exact coordinate)...
http://www.acrelectronics.com/PLBorig/406plbnew.html
In the USA, here is the NOAA online database for registration...
https://beaconregistration.noaa.gov/...aconOwnerLogin
The nice thing about this, is that I can take it with me on backcountry wilderness trips and other places, because it isn't bolted to the airframe. Also, if your aircraft catches fire, you might not get to your ELT in time. This fits nicely in my crew vest, so I always have it with me. Hopefully, I'll never use it (sounds of knocking on wood).
One more thing. I don't like the smaller PLB units because the antenae is too short. A recent test proved that if your antenae is under even a couple inches of water, it won't work. The unit above has a flexible antenae that wraps around the outside (not shown in picture), so it extends out to almost 18 inches. Also, I don't like the PLB with integrated GPS because if the GPS fails, so might the rest of the unit. Futher, GPS technology changes often and I would like to be able to be able to upgrade my GPS without changing my PLB (not much technology to change in satellite transmission). These things can get expensive.