They have the DSRV for when Submarines get into trouble but nothing for when they send up a crew of astronauts and they make it to orbit.
They have "escape trunks" on submarines too. We called them "mommy hatches", as in, "See, mommy? It's okay, we can get out."
What we didn't tell them is that the depth restriction on them covers less than 1 percent of the ocean. DSRV's are nice, but good luck 1--getting them where they're needed in time, 2--in water shallow enough to where the boat hasn't already imploded (see aforementioned depth restriction.)
Bottom line, if we went down, it was a question only of whether we'd freeze (like the guys on the Kursk did), drown (possible), get an embolism if we tried to use the Steinke hoods, or incinerate (adiabatic compression of the fuel vapor when the hull imploded.)