The Battle of Doro Passage took place on 16 October 1827 .
Was a small naval engagement in which a British merchant ship , Comet , was captured by Greek pirates but then liberated by an escorting warship USS Porpoise .
The Battle of Doro Passage took place on 16 October 1827 , and was a small naval engagement in which a British merchant ship , Comet , was captured by Greek pirates but then liberated by an escorting warship USS Porpoise .