Instead, Seasats is all in on small unmanned surface vessels with three variants: Lightfish, which is about 12 feet long; the 20-foot Quickfish; and Heavyfish, the company’s largest offering at 35 feet long. “All of our substantial business is on Lightfish, so that's really where 95 percent of our focus is. “There's some understanding now that's like, oh, you can put vessels that are 12 feet long anywhere in the world,” Flanigan said. WelcomeYou’ve reached the Defense Business Brief, where we dig into what the Pentagon buys, who they’re buying from, and why. Thus, if the average BBGN cost about $18 billion, the Navy could buy five destroyers for the price of one battleship.”