His entire World War II submarine career was spent on board USS Drum (SS-228), where he was awarded a Silver Star as a lieutenant in charge of torpedoes and gunnery, and the Navy Cross as its commanding officer.

Beginning submarine training in 1940, he joined the crew of USS Drum (SS-228) in time for World War II.

Rindskopf served on board Drum for eleven patrols and was awarded a Silver Star as a junior officer for torpedo and gunnery excellence.

He would tell the crew of a target nearby by wearing "a garish yellow aloha shirt I had purchased in Honolulu, and lo!

"[1] He married Sylvia Lubow on April 16, 1941; their only child, civil rights lawyer Peter Rindskopf, was born on July 25, 1942.

DRUM (SS-228), on the ELEVENTH War Patrol of that submarine during the period 9 September 1944 to 8 November 1944, in enemy controlled waters of the Luzon Straits in the Philippine Islands.

His conduct throughout was an inspiration to his officers and men and in keeping with the highest traditions of the United States Naval Service.

"His stated position was that such language was simply evidence of mental deficiency on the part of the user, and the crew followed his example as long as he was in command.