Crossbow was an early 1970s proa (or asymmetrical catamaran) sailboat.
[1] The vessel was 56 feet long and had a 60 foot mast, but was only 22 inches wide.
It was built of cold moulded plywood.
[1] In 1972 Crossbow claimed the record for the world's fastest yacht at 26.3 knots.
[1] Crossbow has been preserved and is owned by Sir Timothy Colman.