Related thread: http://www.goldhawkinteractive.com/forums/showthread.php/6119-so-I-just-flew-over-a-field-in-a-chinook-and-I-have-no-idea-where-the-nearest
Since the pilots at the very least would be able to see where the UFO was when they landed, should the nauts know where it is? How much info about the map should the nauts have when they land? How much is realistic?