You will again be on the ocean's floor. When you regain control over your character, perform a Data Buffer on the corpse lying right next to you.
You will soon arrive at the Omicron station entrance - which, as you've probably guessed by now, is locked, because it has no power. Right next to the gate you will find corpse, on which you can perform another Data Buffer.
After getting to the tower, in which you must restore the power, place your Omnitool in the socket by the computer, to summon Catherine. Use the time she is speaking to look around the area. First things first, perform a Data Buffer on the corpse next to the computer. Right next to it there's a growth to regenerate health. Climb up the ladder, where you will find another collectible, a note.
Another Data Buffer can be performed on the corpse lying next to the ladder, which is used to get out of the tower. Head towards the gate to station Omicron. Press the button located to the right of the entrance, and then get inside. There you will find a map, lying on the furniture.