a quote from this site http://www.militaryhistoryonline.com/wwii/dday/pointeduhoc.aspx
"The Rangers headed for the cliffs, but now they found themselves only on the Eastern side of the point when the plan called for landings on both sides. The beach at the base of the cliff was only 30 yards wide and heavily cratered from the bombardment. In order to climb the heights, the Rangers' LCA's were equipped with rocket-fired grappling hooks and the DUKW's were fitted with fireman ladders. But, because of the shelling from the USS Texas and others, earth had piled up at the base of the cliff and the DUKW's couldn't approach close enough to the cliff to effectively use their ladders. On the other hand, the piling at the base gave the men somewhat cover from enemy fire and also made the height to climb less.
After several failed attempts (due to the weight of soaked ropes) and due to the assistance of naval artillery (especially the British destroyer the Talybont), the Rangers finally struggled to the top after incurring only 15 casualties. As men reached the top, they went off in small groups to accomplish their missions."
some moe sites about the Pointe-du-Hoc
http://roselli.org/tour/06_2001/163.html
http://www.150th.com/letters/btl_monu.htm