Boardshorts are a form of long, loose-fittng shorts specifically designed for beachwear and aquatic sports. They may also be described as “baggies” or “jams”. As “surf trunks” they first emerged in Hawaii in the 1950s, distinguished by their construction which included fly fastenings and secure pockets with sealable flaps.
Cargo shorts are an abbreviated version of cargo pants, typically around knee-length, with multiple pockets that are typically stitched to the outside sides of the legs. In 1980 cargo shorts were marketed as ideal for the sportsman or fisherman, with the pocket flaps ensuring that pocket contents were secure and unlikely to fall out.