The following video demonstrates big storm waves at sea.
Friday, January 30, 2009, 11:31 AM USS Kitty Hawk in Western Pacific. It's not often you see an aircraft carrier take waves over the bow. To put it in perspective, the deck is 102 feet off the water when docked. You can see the ship shudder when it crests (camera wiggle).
(Right click the dark box below and select "PLAY")