Should planes be fitted with something like this in an 'inaccessible in flight location' (maybe on the tail fin)
http://www.globaltelesat.co.uk/satph...Messenger.html
It's a GPS tracker that can report it's position by satellite every few minutes (5 / 10 minutes would probably be good). Would probably also be useful for oceanic ATC.
[I am aware of the project to have satellite based ADS-B recievers]