The alert message and location is transmitted to whatever governmental authority is responsible for the area where the beacon's distress signal was activated, as well as the authority where it was registered. Wherever it was registered will aid the local authority in whatever capacity they are able, be it simply contacting the registrants emergency contacts and relaying pertinent information, or rending other forms of aid should it be necessary. Should the local authority be unable to affect a rescue, they may request aid as well. The US Navy often aids in rescues in the event they are nearby as they typically have far better search capabilities than most third world responders do. That doesn't mean the French are gonna send a frigate all the way to Indonesia to pick up a French tourist, but the RAAF might very well provide helicopter or P3 Orion support should the French request it. It happens more than you would think.