This unfinished page contains text from either the 2003 or 2005 print version of Encyclopedia of Surfing. An updated version, with more photos, is coming soon.

As an oceanographic term, "trough" is used to describe either the low point between two waves or a deep-water trench in the ocean floor. As a surfing expression, it generally refers to the flat water immediately in front of the wave face. Bottom turns are performed in the trough....

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