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You are looking at a preview of what’s in the timed ACA Online Paddlesports Course. Feel free to look around, but you’ll need to register to begin progress toward getting your Course Completion Certificate.

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You also should consider the board’s rails and depth when selecting a paddleboard.


The shape and volume of the rails affects the board’s stability.

  • Stand-up paddleboards with rounder rails usually are less stable, and those with square rails are more stable. Rounder rails also increase the board’s speed.
  • Rails with more volume make the paddleboard more stable.

A paddleboard’s depth tells how far the fin goes into the water. Depth affects both the board’s stability and its maneuverability in surf. Fins with greater depth give you more control but also have more drag.