Sonderklasse

{{Infobox sailboat specifications

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|image = Sonderklasse Kiel2007.jpg

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|caption = Sonderklasse-boat

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|design = Development class

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|mainsailandjib =

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|year = 1898 (rule design)

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Sonderklasse (lit. Special class) is a sailing class designed in 1898 by Lübecker Yacht-Club, Norddeutscher Regatta Verein and Kieler Yacht-Club.{{cite web|url=http://www.chiemsee-classic-circle.de/fotogalerie/sonderklasse/ |title=Sonderklasse :: Chiem |publisher=Chiemsee-classic-circle.de |date= |accessdate=2015-10-07}}