Definition: Fins act as keels under a surfboard. They dictate both direction and maneuverability. Fins can be made of fiberglass or plastic and can be glassed in as a permanent fixture or screwed in with a special system that allows removal at your discretion. The most basic configurations for fins are in groups of three, two, or even as a single entity.
Also Known As: skegs
Examples: When the surf is really small, I take out my third fin, so my board turns more quickly.
