Check out this photo of USS Pickerel from 1952:
From the description:
USS Pickerel (SS-524). Surfacing at a 48 degree up angle, from a depth of 150 feet, during tests off the coast of Oahu, Hawaii, 1 March 1952. Donation of Captain Allan Brown, USNR(Retired), 1976. U.S. Naval Historical Center Photo #: NH 85082What's the biggest angle (or roll) you've ever experienced?