Twin-fin: the keel system that popularized fish surfboards

The term "twin-fin" refers to surfboards with two fins, although it is often used to describe a particular type of shortboard. Let's dig more into this hybrid concept.

The twin-fin setup has a long history, with California board designer Bob Simmons creating dual fins in the late 1940s and early 1950s.

Simmons was using his preferred "dual fin" design while surfing at Windansea in San Diego when he drowned in a wipeout in 1954.

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