LONDON.- RM Auctions announced the consignment of the world-famous Ferrari-engined Hydroplane racing boat, ARNO XI, to its highly anticipated Monaco auction, 11th – 12th May, 2012. A unique piece of history, ARNO XI joins an elite roster of blue-chip automobiles and motorcycles slated for the multi-day sale at the Grimaldi Forum. Held during the same weekend as the Grand Prix de Monaco Historique, RM’s two-day, biennial Monaco sale follows a record-setting debut auction in 2010 which saw the Company achieve over €33 million in sales, with bidders representing more than 33 countries from around the world. This year’s event is set to continue the momentum, bringing together a magnificent roster of collectible vehicles with the world’s most discerning collectors. “We are thrilled to be offering the historic ARNO XI at our Monaco sale. This awe-inspiring racing boat has beauty, history, provenance