3:54 Deep Sea PA down from 4:35! Gains 41 seconds and 50 points.
This is a frustrating level to begin with. Firstly, the enemies: the cloak guards, to begin with, are nightmare incarnate. They AREN'T wearing shields, but they have enough body armour that they can take a shotgun blast to the chest (and two to the shoulder) without even flinching - which is amazingly annoying because if you've been playing this game very long you'll know that one of the keys to success is wounding a running guard so he stops moving and becomes an easier target, and that tactic just doesn't work here. This is not to mention the utter lack of cover anywhere in the first few rooms. Then there are the red-dungareed guards who are much harder to kill than they have any right to be.
The second problem is the weaponry you're provided with. The IR visor blocks out most of your peripheral vision. The Falcon has only 50 bullets, and you'll be astounded how quickly they get used up. And the shotgun is random, inaccurate, contains an ODD number of shells and takes horrific amounts of time to reload.
After a while I figured out how best to deal with these hurdles. I took a lot of inspiration from the best known video but there were plenty of my own touches so I'll just direct you to my strategy.
That's two out of three. I just need 3:59 Attack Ship PA and I'm done. Overall total: 2:03:19.