Center Boarder

a single-masted, shallow-draft racing or pleasure sailboat equipped with a centerboard. Center boarders range in length up to 12 m. They have a gaff or Bermuda rig and are sometimes equipped with an engine. Center boarders are not very seaworthy and therefore are usually used where large waves are uncommon—on rivers, lakes, and small reservoirs. Their shallow draft permits them to sail in shallow waters with the centerboard retracted.