My understanding is that Gulfstream company pilots were conducting a cold soak flight. The cold soak flight is one of a series of test flights done before the delivery of a jet to it's operator. During this flight they do sound and temperature surveys of the cabin, make sure everything in the cabin and cockpit works properly, conduct SatCom registration, and conduct RVSM certification.
I made a new thread so I wouldn't threadjack.
Do many military planes deal with RVSM, HF reports and other sorts of international navigation issues? I guess the meat of my question is do many military planes deal with international flying similar to civilian flying? I can understand long range transports conducting similar operations, but I just wonder how much the military does their own thing. Mid air refueling, flying in formation, ect.