Crab, do you understand how sat trackers work?
yes thanks, and I know you can't home to them like you can with a 121.5 emitting 406 beacon. You also can't home to a 406 beacon because it isn't a constant transmission, just a burst transmission every 50-odd seconds or so - that's why they tx on 121.5 as well.
PLBs/ELTs on 406 don't need subscriptions and have better coverage than personal sat-trackers