Infinite Campaign direction

Before moving on to Mission 8 “Pelican Down” I decided to do some exploration. Now that I’m trying to get back to the mission, every direction I seem to take to get to my map marker seems blocked by these infernal invisible walls.
What is the correct position / direction??
Thank you so very much in advance. I am quite frustrated

The barriers are dropped when you pilot a flying vehicle. Call in a Wasp at a FOB and you should be able to get over there.

If you don’t have enough points for a Wasp, there is a FOB that always has Banshees next to it, but I can’t remember what it was called.

Currently using a WASP.
And I can’t upload pictures of the map as a new user :rage::rage::rage:
Any ideas??