Access the Power to the People machine at the base of the stairs and upgrade one of your weapons. Take a moment or two to melt all of the ice around the room, starting with the floes under the stairs. Crack the safe in the freezer on the right, then enter the freezer across the room and melt the ice blocking the secret passage to Smuggler’s Cove. Follow the walkway out of Neptune’s Bounty.
Safe
Contents: 4 Antipersonnel Pistol rounds, 3 Electric Buck, Automatic Hack Tool
Enter the freezer on the east side of the room and kill the two Splicers inside. The safe is in the rear of the freezer, hidden amongst the piles of crates. Use an Automatic Hack Tool to open it quickly, as you’ll just get another one back in return anyway.