I have seen him with one (in a photo). They would still need to be fairly close to him to pick up the signal, assuming he was wearing it. His plane is also fitted with a beacon that goes off if there is a large impact. I guess it is good that they haven't picked that signal up. I have been wondering if you could set off the beacon manually. I would seem like you would be able to turn it on without an impact. Otherwise I would be out there beating on it with a rock caveman style.
He is a smart, well trained guy. If he survived the landing he has a good shot at making it home.
I'm keeping my fingers crossed.