Quote Originally Posted by Khalithar View Post
Can anyone condense the information of how to unlock the different sectors? Not screenshots just "send submarine to X to unlock Y."
neolith island > cobalt shores
offender's rot > mystic basin + deep sea site 4
unidentified derelict > central rimilala
central rimilala> wreckage of discovery

Basically, every 2* node unlocks at least one 3*. The route doesn't matter, just a chance when you visit the node.