
The Seawolf class was the best, most advanced submarine of its time, but production was halted after three submarines due to enormous cost overruns. The Seawolf subs were also built with HY-100 steel hulls, giving them a diving depth of up to 2,000 feet-more than three times the diving depth of her predecessors. Designed to fight the latest Soviet submarines during the Cold War, the Seawolf class is an astonishing 70 times quieter than the previous class of attack submarines, the Los Angeles class. The USS Jimmy Carter was the last of three Seawolf-class submarines built through 1990s and 2000s. The submarine's background could hold clues. At least one and possibly two unidentifiable symbols are visible on the flag. The flag of the Jimmy Carter is no exception. Ian Keddie graphic, used with permission. Signalmen on the submarines were responsible for updating the flags with the latest new symbols to reflect newly completed missions. The six daggers on the flag allegedly represent individual clandestine missions. The flag was created after Operation Mincemeat, a secret mission that involved dropping a cadaver carrying top-secret plans off the Spanish coast as part of a ruse to deceive the Axis. Look at this flag from HMS Seraph, a Royal Navy submarine that served in World War II. The black flag adorned with a skull and crossed bones, often features additional signals when it's used in this modern content.

Legend has it the flag, traditionally considered the flag of pirates, was adopted after a British admiral in World War I compared submarine warfare to piracy. As the Washington Post points out, the practice for subs began in World War II, when Royal Navy submarines flew the flags as a means of signaling a successful mission. In Navy tradition, the flying of the flag typically signifies a successful mission of some sort. The Jimmy Carter also flew the Jolly Roger in April 2017 returning from another patrol. On the flag is at least one unidentified symbol. Flying above Smith, fluttering in the Puget Sound sea breeze, is the skull and crossbones of the Jolly Roger.
