umm, incorrect, the officer in charge of a ship is referred to as Captain regardless of rank. I had just misremembered reading his/Harder’s remarkable exploits decades ago.
Also, though I didn’t recall many/most US Pacific subs with a full CDR as Captain his citations answers my ques
Then I am incorrect if you are right. I was puzzled as to why you would ask the question if you knew.
And by the way, I was referring to it in the sense of a “frocking”, not in the sense of an actual position as the Captain of a vessel.
I had thought that a LCDR in command of a vessel was referred to as “Commander” when being introduced or addressed by other officers in his role and not differentiating between LCDR and CDR. I don’t think it would be the same for a LT who was in charge of a boat.