The following is the command investigation into the Oct. 2, 2021 collision of attack submarine USS Connecticut (SSN-21) into an underwater seamount in the South China Sea.
From the investigation
On 2 October 2021, CONNECTICUT grounded on an uncharted bathymetric feature while operating submerged in a poorly
surveyed area in international waters. This mishap was preventable. It resulted from an accumulation of errors and
omissions in navigation planning, watchteam execution, and risk management...