Bunk trailers utilize two or more elongated boards, called bunks, whose job is to support the centerline of the boat’s hull. Unlike roller components that some boat trailers have, bunks distribute the boat’s weight more uniformly. Each side of the boat is braced by one bunk, with both bunks being covered in water-proof fabric that not only protects the boat’s exterior finish but makes movement of the boat, on and off the trailer, a somewhat effortless endeavor. For towing, bunk trailers are used, usually, for boats 20 feet, and under. Bunk trailers, however, can be used for larger boats for purposes of on-land storage. more