When was the last wartime engagement of a submarine deck gun against a surface ship and what were the facts and circumstances?

The last wartime engagement of a submarine deck gun against a surface ship occurred on May 23, 1982, during the Falklands War. The British submarine HMS Conqueror fired its deck gun at the Argentine ship ARA Santa Fe, which was a navy corvette, after it had been damaged by torpedoes. The engagement was part of a broader conflict over the disputed Falkland Islands and highlighted the role of submarines in naval warfare during that period. The Santa Fe was ultimately sunk, marking a significant event in the use of submarine armaments.