Act Six: Voyage To The Bottom
Location: The USS Resolve.

Somerville: Why don't you get some sleep, uh? Make it at least six hours before we have to go deep.
DQ3: I'm not going to take her to 3,800 feet all in one shot, she's been in slow descent for about half an hour now.
Somerville: Ah, huh, seems that your father, uh, taught you well, huh?
DQ3: Dad died when I was nine, remember?
Somerville: Right.

The submarine comes up on a half eaten dead humpback.

Miklos: It's a large object! It appears to be dead in the water, about three hundred meters ahead.

They look at a 'sonar image'

Miklos: By the size, I'd say a very large grey whale.
DQ3: What killed it?
Miklos: Sharks! Have been feeding on it.
Robin: Eeeeh! Sorry, Miklos, but you lose all your points in the final Jeopardy round!
Miklos: Excuse me?
Robin: Giant grey's are not shark food, they die they sink to the bottom of the ocean and become sturgeon food.
Miklos: So what do you think?
Robin: I think the Navy has tested a new underwater laser cannon on it.
Miklos: I find that highly unlikely.
Robin: Sounded pretty good to me.
DQ3: What's your take on it? Alastair?
Somerville: Uh, I dunno, I don't think its our problem.

OK, it's clearly a humpback whale. It just IS. The irony here is that humpbacks weigh about the same as a Grey whale, and are slightly larger, ergo, it'd be even more impressive had they called it that. I have to call Robin here, the question is what killed it, not if it is sinking. It makes no difference what killed it - it'll still end up on the bottom. Sharks, however, certainly do eat dead whales, and there's some evidence they may predate live ones too. All in all, she's just being a moron.
Not quite as much as DQ3 however, the marine biologist, who asks the opinion of an oil rig builder about a question of marine biology. Muh uh?

DQ3: Full speed ahead!

Cut to Robin in a bunk, surprisingly not in underwear, although water does pour onto her.

Robin: Ah! Ah shit!

She leaps up to turn a valve. We cut to the 'bridge'.

DQ3: OK, level it out here.
Somerville: No, no, just a few more feet.
DQ3: Somerville, we're at the limit of the hull, can't you hear it?

Cut back to Robin, now in a wet white vest as she walks up to the bridge, and a tap splashes her tits with more water in a remarkably accurate shot.

DQ3: Hey! Shut the valve!

Robin closes a valve, then turns and gets shot in the tits by a whole new leak.

DQ3: It's that valve down there!
Robin. Yeah. Don't worry about me boys, I was already wet.
Somerville: OK, do we have video?

First things first, one has to wonder if Somerville meant a video of Robin's prodigious melons getting soaked with water rather than 'of the outside'. But it also ought to be mentioned that you can't close leaks in a submarine by turning valves, what you see when this is shown in real submarine films is them opening a valve to let more air in, so that the air keeps the water out. Water that, by the way, is coming from a busted water pipe, not the ocean - if the ocean's getting in, then you're history.

Somerville: Can we, can we get a better image?
DQ3: Camera's only meant to go down to fifteen hundred feet, OK, the pressure's screwin' up the circuitry.
Somerville: Camera's only work to fifteen hundred feet on a sub that's 'sposed to go to thirty eight hundred?
DQ3: Yeah, yeah, cameras go deeper cost twice as much, alright?
Somerville: Ah, great.
Miklos: Captain! It's less than twelve more feet down!

So, what, eleven feet?

DQ3: OK, proceed to dock!
Robin: Ever hear about the straw that broke the camel's back?
DQ3: Yuh.

A long shot of the sub approaching the rig thingy.

There doesn't appear to be any actual rig, there's no big leg things, just a generic sci fi base on the ocean floor, but perhaps mostly notably, the sub is WAY more than twelve feet above it, just eyeballing it but you're talking about three to five hundred feet.

Act Five: Where did we park the submarine?

Act Seven: Having Fun on the Station