Expose them to what? All the computers I developed on were generally supposed to replicate the hardware on the sub itself. Everything is self-contained on a sub

Expose them to what? All the computers I developed on were generally supposed to replicate the hardware on the sub itself. Everything is self-contained on a sub. (maybe they have Ethernet going between computers, and never wifi because that could generate findable "noise" by sensors in ships or other subs, but not to the internet at large) This is by necessity as subs don't get access to the internet when they're underwater for 6-9 months or so, except in VERY limited cases where they can connect to a satellite for a very brief period of time and get something like 1kb of download.