Tigercat was a 1960s catamaran sailboat of the Eastern Multihull Sailing Association. In 1961 it was defeated by John Fisk sailing Hellcats II of the Clapham Sands Sailing Club four races to one.
- "The Historic Lock Crowther Kraken & Bunyip Open Trimarans".
The first of these challenges took place in 1961 at Long Island NY. John Fisk sailing Hellcats II of the Clapham Sands Sailing Club managed to defeat the American defender Tigercat of the Eastern Multihull Sailing Association four races to one, finally winning an Americas Cup Challenge.
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