Event Brief
US Navy nuclear submarine USS Guitarro sinks at pier
By The BriefBrief · Sources (1)
Filed: Aug 29, 2026 at 12:00 AM ET
Summary: 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: 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.
ℹ️ This event is analyzed using pattern arcs, velocity indicators, and source analysis in our MI Console.
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