The Trieste descended 35,797 feet into the Challenger Deep—setting a record that was not broken until April 2019, when Victor Vescovo’s Limiting Factor submersible dove to 35,843 feet
The US Navy attack submarine USS Annapolis (SSN 760) rests in the Arctic Ocean after surfacing through three feet of ice during Ice Exercise 2009 on March 21, 2009. The two-week training exercise, which is used to test submarine operability and war-fighting capability in Arctic conditions, also involved the USS Helena (SSN 725), the University of Washington and personnel from the Navy Arctic Submarine Laboratory.
Three polar bears approach the starboard bow of the Los Angeles-class fast attack submarine USS Honolulu (SSN 718) while surfaced 280 miles from the North Pole. Sighted by a lookout from the bridge (sail) of the submarine, the bears investigated the boat for almost 2 hours before leaving. Commanded by Cmdr. Charles Harris, USS Honolulu while conducting otherwise classified operations in the Arctic, collected scientific data and water samples for U.S. and Canadian Universities as part of an agreement with the Arctic Submarine Laboratory (ASL) and the National Science Foundation (NSF). USS Honolulu was the 24th Los Angeles-class submarine, and the first original design in her class to visit the North Pole region. Honolulu was assigned to Commander Submarine Pacific, Submarine Squadron Three, Pearl Harbor, Hawaii.