Open 50 Sailing yacht The Open 50 is a type of monohull sailing yacht and former ISAF international class. It is also known as the IMOCA 50, due to its origin in the International Monohull Open Classes Association.[1] See also[edit] Open 60 References[edit] ^ sailing.org: "FORMER ISAF CLASSES" This sailing-related article is a stub. You can help Wikipedia by expanding it.vte vteClasses of World SailingCurrent Olympic classes 470 49er 49er FX Finn IQFoil Laser Standard Laser Radial Nacra 17 World Sailing centreboard classes 29er 420 505 B14 Byte Cadet Contender Enterprise Europe Fireball Flying Dutchman GP14 International 14 International FJ Laser 4.7 Lightning Mirror Moth Musto Skiff O'PEN Skiff OK Dinghy Optimist RS Feva RS Tera RS100 RS500 Snipe Splash Sunfish Tasar Topper Vaurien Zoom 8 World Sailing keelboat classes 2.4 mR 5.5 m 6 mR 8 mR 12 mR Dragon Etchells FarEast 28 Flying Fifteen Hansa 2.3 Hansa 303 Hansa Liberty H-boat International One Design J/22 J/24 J/70 J/80 Melges 20 Melges 24 Melges 32 Micro Platu 25 RC44 SB20 Shark 24 Soling Sonar Star Tempest Viper 640 Yngling World Sailing yacht classes Class40 ClubSwan 50 Farr 40 IMOCA 60 J/111 Maxi Soto 40 Swan 45 TP 52 X-35 X-41 World Sailing multihull classes A-Class Dart 18 Formula 16 Formula 18 Hobie 14 Hobie 16 Hobie 17 Hobie Dragoon Hobie Tiger Hobie Wildcat Nacra 15 Nacra 17 Nacra F18 Infusion Nacra 20 Carbon M32 SL 16 Topcat K1 Tornado Viper F16 World Sailing windsurfer classes Formula Experience Formula Windsurfing Funboard Kona Mistral Raceboard RS:One Speed Windsurfing Techno 293 IQFoil World Sailing kiteboarding classes IKA Open Formula Kite IKA Twin Top Racing IKA Twin Top Freestyle IKA Twin Top Kitefoil IRSA remote-control classes 10 rater A Class Marblehead One Metre Former World Sailing classes 11:Metre One Design 29erXX Aloha Buzz C-Class Division I Division II Division III Elliott 6m Farr 30 (Mumm 30) Farr 45 Farr Maxi One Design Hobie 17 Hobie 18 IOD ISO Laser 2 Laser Vago Lechner A-390 Mistral Junior Mumm 36 Nacra F18 Open 50 ORMA 60 Sydney 40 Ultimate 20 Windglider X-99