TFTD research question

[BBHood217]

Do I need a lobsterman navigator to research the magnetic navigation?  Also just to be sure, researching a live deep one early won't screw me over later, right?

And I guess I might as well ask this too: Has anyone made a mod that replaces the one lame human death sound in TFTD with the ones in UFO?

[Starving Poet]

No navigaator - and I presume deep one research has been fixed - I still hold off on them out of habit.

And for the second one, I don't think so.

[BBHood217]

Forgot to ask, can a lobsterman navigator unlock The Ultimate Threat too?

And can one lobsterman commander unlock both the Leviathan and T'leth at once?

And just at random, whose bright idea was it to swap the navigator and leader ranks?

Edit: Okay, just one more.  If I get the calcinite autopsy entry from a medic, can I still research the actual calcinite corpse to get vibroblades?