Back in the late ‘70’s a US Navy LHP returning from the Med with a Marine BLT on board took green water over the bow just off the North Carolina coast.
The flight deck of an LPH is 60 feet above the waterline. Several CH-46 helos tied down at the bow had their folded rotor blades broken by the force of the water coming over the deck.
I have no trouble at all believing that. The wave the Ramapo measured was 112 feet, and I’m sure that much bigger waves pop up from time to time. Luckily, not often!