This Naiad fin is pressed onto its splined shaft, and stays put without fastenings. Removing it requires special equipment, though. Note the narrow winglet at the tip of the fin to make it more efficient.
U.S. Submarines is a company with a dream. And that dream is building underwater megayachts for clients with both the cash and the chutzpah for such a venture. Right now the company has a 118-foot project in the works. And we’ve got images of it. Click here to see them. ▶