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Fly to the Himalayas and keep your craft there "Patrolling" you should find the final base...then use the final craft (for IG Gorgon) to go there...but Gorgon...best way its to build a new base next to the final base...transfer there the Gorgon + squad + gear and do a short trip...because when I tried to move across the whole continent...well those endless spawns of UFOs destroyed my Gorgon and my 15+ fighter craft where not enough to protect it