Quote Originally Posted by zztoluca View Post
Upwell is unlocked via The Wreckage of the Headway. For some reason when reviewing past voyage it doesn't show it but it is in my chatlog.

All shark parts.

30 surveillance 110 retrieval on full Shark. I had issues unlocking deep sea 7, then just said screw it and went 20 surveillance 140 retrieval. Unlocked on first ship. -5 surveillance 160 retrieval unlocked the next two zones for me first ship.

I'm convinced that high retrieval aids in unlocking zones, not surveillance.