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North Carolina (SSN 777) was christened on 21 April 2007 sponsored by Linda Bowman, wife of Admiral Frank L. "Skip" Bowman, former director of Naval Reactors. She participated in the keel laying ceremony on May 22, 2004.

On 24 April 1988 Bonefish was submerged, during an exercise with guided-missile frigate USS Carr, about 160 mi (260 km) off the Atlantic coast of Florida, when seawater began leaking onto cables and electric buses in a battery-supply cableway. Arcing then caused an explosion, which flashed into a fire within minutes. The temperature…

On 25 August 1949, Cochino ran into a violent polar storm off Norway. The huge waves slammed the submarine's snorkel so violently, and jolted the boat so severely, that the pounding caused an electrical fire and battery explosion, followed by the release of deadly hydrogen gas. Defying the most wretched…

The crew was rescued before the sinking.

Stickleback was one of 4 US submarines lost after WW2 - Cochino (SS-345), Thresher, and Scorpian

On May 19, 1969, at the Mare Island Naval Shipyard in the San Francisco Bay Area, the nuclear-powered attack submarine Guitarro (SSN-665) sank in 35 feet of water (while tied up next to the dock) when the forward part of the ship suffered uncontrolled flooding. The submarine was under constructio…

20 deaths (3 crew and 17 civilians) due to inadvertent release of halon

According to the official Chinese news agency Xinhua, all 70 crew members died when the submarine's diesel engine used up all available oxygen (because it had failed to shut down properly) while the boat was submerged on April 16, 2003.