This movie was one of my late Father's favorites. He was a plank owner on the Atherton DE-169 and his ship sank the last U-Boat of WW11 just off the coast by New Port ,RI. He was a First Class Signalman so was on the bridge thru out the battle, and is later pictured in the Whale Boat recovering debris from the sunken U-Boat. He recovered the German Kapitan's hat and gave it to his Capitan, Lt Commander Iselin of the Atherton. It along with other artifacts is on display at the DE Sailors museum at Albany New York on the USS Slater ,the finest restored DE in the naval museums available. I really enjoyed seeing it when I was there.
Point of info to you. The Albany CG10 was supposed to go to its named for city but the dingbat mayor at the time did not want to spend the money and it got turned into razor blades. Later on a private organization got tied in with the Slater and we got that one. I served aboard the Albany for a short period in the 60s!
I knew a couple old timers that worked on the Slater. I was born and raised in Albany and still lived in Albany county when we got the Slater! To the best of my knowledge the Slater is the only DE afloat!