Looks nice and spacious in there, but it needs a purpose. If it's a fighting sub, needs more guns-n-such. If it's for search or rescue, needs some claws or grapples or something. But still nice overall design.
Quoting MOCrazy !
The only thing I would change is to not have the front so flat but other than that, it's pretty cool. We should try to get the group more active again. Are you planning on entering Mission 3?