Hi this is my first post and have been following and researching the easter egss a lot and this is not my findings but something I found in which going to this link.. easycaptu.re/pMUcm.txt and then pressing ctrl and f searching for navcard successfully accepted also just below that it says about opening a door for 3000 and clearing debris for 3000 which I have not yet seen anywhere on the map but if you take a look and search through there is a lot of interesting things you can find in the game files and definitely don't give up hope there's importance to using the navcard somehow!