Event Brief
Aug 29, 2026 at 12:00 AM ET
US Navy nuclear submarine USS Guitarro sinks at pier
By The BriefBrief
USS Guitarro, a Sturgeon-class nuclear attack submarine under construction, was flooded by two civilian crews that did not communicate. One crew began flooding the after section; another later added water forward to correct trim. For nearly four hours both teams flooded opposite ends until the submarine sank at 8:55 that evening while still tied to the pier.
WHO: Two civilian crews working on USS Guitarro
WHAT: USS Guitarro was flooded by two crews and sank at the pier during construction.
WHEN: Reported Aug 27, 2026 at 8:00 PM ET
WHERE: Location not specified
WHY: Two crews flooded opposite ends of the same submarine without communicating, leading to the flooding and sinking.
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