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Second room of the Airlock roomtype, 2nd of the trenchbleeder swim areas. It takes place in the open ocean, follow the green lights, there are no other threats except the Trenchbleeder. You may sprint through the room with sprints in a straight line. PSS/SS is inside the rocky walls around the entrance and end airlocks, as they have no collision. Dead zone.

Big room (probably rare) with big door, can't interact with purple keycard reader. Node path does not go down. Possible PSS (untested): crouching and looking down under the stairs behind the desk (6th screenshot) or crouching and looking down behind the car (7th screenshot).

Big room with hallway at the end. The first PSS is shown on 5th and 6th screenshots, climb over rails at the start of room on the left side and fall into air pocket (be careful of parasites). The second PSS is located at the end of room and shown on 7th and 8th screenshots, hide exactly like me on 8th screenshot. For SS stand behind the box next to start of hallway as shown on 9th screenshot (it is also DPSS). Another SS is next to a pillar at the middle of room (shown on last screenshot), but likely works only with low avatar width. [Not tested on Chainsmoker]

Long room that goes down. SS is on 4th and 5th screenshots, another SS is on 6th and 7th screenshot. [The second one is not tested with high avatar width]

Long Ridge room with a catwalk at the middle. The first SS is at the end of the room and shown on 4th screenshot, you can fall down from there, which will lead to softlock. The second SS is at the start of the room behind the locker on the left and shown of 5th screenshot. The third SS is behind the crate at the end of room and shown on 6th screenshot (does not work on high width and on Chainsmoker). And untested PSS is shown on 7th screenshot, crouch and look down, works only with low avatar width.