Non Stop Dallas USA to Sydney Australia, GPS works everywhere

I flew back to Australia last night as a passenger with Qantas. I had requested an upper deck window seat and purchased a second GPS and a magnetic compass to conduct more analysis during the flight. I copied the filed flight plan into my Foreflight App so I could follow the route accurately. (If you sign into FlightAware you can see the filed plans for each flight). The magnetic compass is totally unreliable inside the cabin.

Both Bad Elf GPS units worked flawlessly from the USA to Australia. Even in the middle of the Pacific Ocean crossing the Equator.