Dwarfing all previous flying giants, the Pelican, a high-capacity cargo plane concept currently being studied by Boeing Phantom Works, would stretch more than the length of a U.S. football field and have a wingspan of 500 feet and a wing area of more than an acre. It would have almost twice the external dimensions of the world’s current largest aircraft, the Russian An225, and could transport five times its payload, up to 1,400 tons of cargo.
Designed primarily for long-range, transoceanic transport, the Pelican would fly as low as 20 feet above the sea, taking advantage of an aerodynamic phenomenon that reduces drag and fuel burn.
http://www.boeing.com/news/frontiers/archive/2002/september/i_pw.html
This thing surely sucks up a lot of low flying sea birds that glide around using the same lift principles.
Rogue waves would really suck.