Originally Posted by
helicopter-redeye
So if an aircraft transponder set to 7700 does not give a location how do I see aircraft with 7700 set flying a destination alternative or return to departure on Flight Radar 24?
The 7700 just broadcasts that an in flight emergency is occurring. ADS-B is providing position, direction, speed and altitude data. And the ADS-B won't tell the world where the aircraft is after loss of aircraft electrical power resulting from engine shut-down or impact with the ground.