It's been a while, I wasn't onboard either of these ships (at the time - I was on PRO later in the 80's), so the exact details of time and ship are fuzzy, but here is the tale:
In the late 70's, an East Coast AOR, either PRO or PRE, went through a hurricane in the North Atlantic on their way back from Europe, sailing into the winds and sea, at night. The bow would raise right out of the water and come crashing down in the through with water breaking over the bow and spray washing into the bridge window, get passed, clear the view for the watch on deck to peer out for a few seconds and the cycle would repeat all over. Then, after one such cycle, the OOW peers out the window and ... grabs the phone and calls the CO: "Captain , Sir. I think you will want to see this for yourself", leading to the fastest sprint to the bridge by a four ringer in the history of the RCN.
C.O. gets there and they both peer forwards: The bow chaser ( a twin 3"50 gun turret right at the bow) had been washed clear off the ship by a wave but by some miracle, didn't hit anything on its way to Davie Jones locker. All that was left was the empty hole where the gun turret had been.
We've all seen rigging, or boats, or even davits crushed or taken out by the sea, but a whole gun turret? That is the only instance I know of.