Any old timer Navy guys know what this is?

67Dart273 said
Glad you guys had fun with this, I had no idea, looking at the photos I have never so much as been within 15ft of any Naval gun or any other artillery piece

My home for 4 years, lol. It had one 5"/54, BTW. But a shitload of missiles.
Can ya'll imagine the 16" guns on a Battleship? Never had the opportunity to get close to one.