25mm and 50mm can sink a vessel that size....with hundreds of rounds. If I were the Skipper, I’d challenge my Gunners Mates...3 rounds, 5/54=3 days shore leave, no curfew; Chief, and, or Officer of the Deck carte blanche to provide bail IF THE SHIP IS SUNK!
I’d take that. I’m pretty awesome on the 20 mm.