The DSRV looks like a giant, mechanical lobster. It’s a little over forty feet long, twelve feet wide at the nose, tapering back to eight feet wide at the tail. It’s scarcely big enough to stand up in, but the exterior is considerably taller, given the extra layer of metallic sheathing to help protect it from the pressure. The hull was made of ceramic-aluminum casings. These were ultra-light weight, but still as sturdy as titanium. Their relative weightlessness made the Sea Monk buoyant enough not to need large ballasts, unlike most other subs that require a 2:1 ratio of occupancy to ballast.