Spiderfish
SOC-12
Actually Royal Navy submarines have an escape system which can beused at depths of up to 600 feet.Another more fully analogous comparison is submarines. There are no pods on subs. They either suffer implosion or await on the bottom for remote rescue. Remote in both likelihood of success and in mode of operation.
Crew members can be "fired" up to the surface after putting on a special hood. The ascent is so fast (mere seconds apparently) they do not suffer from the "bends".
I've never actually seen this escape mechanism myself but it does exist.