Press a button and go through a door onto the lower level of the Dock, a big room with an upper balcony and a huge red door. Kill the Skaarj and go through a doorway on the other side of the room. Kill the Skaarj and ride the lift upstairs, go through a corridor, you emerge back in the dock on the balcony.
Walk around the balcony, and activate the computer console on the other side, this opens the massive red doors. Jump off the balcony and go through them to the Outer Dock, the doors will close and seal you in.
There are Jump Boots in a crate on the floor in here, and a Shield Belt on the wall about halfway up to the loft platform, you can fall to the belt from the platform.
Ride a lift to the platform, a succession of Skaarj attack, kill them all, and five ramps will sprout out of the walls. Go up all five ramps, reading computer consoles and collecting gear in the short tunnels they lead to. One of the consoles unlocks the doors.
Read the consoles on the platform itself and return downstairs, press the console near the Dock door to open it. Exit the Outer Dock and return to the inner room of the Dock, go upstairs to the balcony, then go through one of the doors on either side to enter a group of corridors.
In here are numerous doors with yellow signs above them, find the door labelled "Cooling System Control" and enter.
Walk down the corridor to a room dominated by a huge pipe. There are two small rooms accessible from here, one to either side. Enter both rooms, killing the Skaarj and activating the computer console in each
Now leave the Cooling System are and return to a group of corridors. Locate a door with a "Containment Field Generator" sign. Go through the door and a hallway beyond. You enter a room with a raised platform and a Skaarj in it. Kill it, read the glass information panels nearby and proceed through a door to a lift. Descend and get off at the first floor. Walk forwards towards a two level chamber, Kill the Skaarj that attack then walk along one of the giant tubes until you reach a T-junction. Go either way to a shielded Containment core. Press the Console to reveal the Core.
Stand well back and shoot it, when it explodes destroy the other core from the other branch of the T-junction.
Return to the lift, go upstairs and return to the corridors with yellow signs. Locate a lift labelled "Engine Power Core Control". Take the lift up into a huge engine room and fight the Skaarj, including one armed with an Eightball gun.
There are two lifts leading up from this engine room, one leads to an area where you need to press a pair of computer consoles to slide engine cores into their slots, the other leads to a room with power suits. When you’ve visited both rooms return to he corridors with yellow signs. Fight more Skaarj and locate a door with a sign reading "primary Turbo-Lift". Go through it and ride one of the lifts upstairs, then go through the door up there to pass through to the next level.