[BradyLS]

130 meters is (very roughly) about 400 feet? What about the bends if they try to do a straight ascent from that depth?

[FreedomPoster]

I believe that's a very technical dive with special gases, but do-able.

[Bellows]

What about the bends if they try to do a straight ascent from that depth?

They wouldn't ascend straight from that depth. They would do a staged decompression ascent, stopping at points along the way up. At what points, and for how long, would depend on their time outside the sub at depth, the gases they're breathing, etc.