A question then...
what helo benefits from a ski ramp?
The only answer that I’ve heard is that the cost to redesign the bow to remove the ski jump from the original Spanish design was too prohibitive so they were built with them - even though they are of no use to amphibious operations. Internally, the two RAN LHD’s are not set up for anything but amphibious craft, combat vehicle storage & supporting helicopter operations, no fixed wing capability.