Voice commands are readily available with the SH3Speech program. It is a ridiculously fun little program to play with in that it has some slang instead of just direct orders... (ie. "Let's get some air, chief" is a recognized command for surfacing the boat). Love it and can't live without it now that I've got it working with Flakmonkeys New Interiors.
SH3Speech
Having the crew relay the information verbally for everything (including things that are only text at the moment....I'm not sure. Never some across such a beast.