This bad boy has you open 5 different arks, and it couldn't be laid out in a more straightforward manner. You open one ark in the tutorial section. Once done, there are 3 arks added to your map between you and the town Gunbarrel. Once you've finished those, start the story mission in gunbarrel, which is tied to this achievement.
While on this mission, you will come across your 5th and final ark.
Skip to 18:55 for A Noah Lot