Ship was sunk by an explosion low and aft of midships, near or under the engine room. It sunk, rolled over and went down with the hull high up when it struck the bottom. (See the crushed superstructure flattened by the ship’s weight: a flattened squished surface, but no explosive damage.)
The fiberglass Bofors gun casing was likewise cracked open by a rock sticking up from the bottom (or the bottom itself) like an eggshell would be cracked between a flat book and a countertop.
May their gods have mercy on the sailor’s souls.
Fiberglass? Really? Talk about a paper tiger...
Maybe. But to me, it looks like the damage is more to the side of the turret, than the top of it. It seems like the damage would require a very convenient rock.