At the “escape from burning ark” point i have gone to the top of the ship but there is no chopper waiting to pick me up or green ring indication to go to the location (i found up what to do from you tube)
You’re a bit ahead of yourself, there’s a specific step to climb to the top of the ark, which you’re not on. (So no copter.) Did you place the charges on the top of the ship? During the “escape” step there’s a tripwire that fires when you cross from the lower deck (where the charges are handed out) to the upper deck. THEN it changes to “Move to the highest point on the ark” which is when you need to climb to the point indicated.