Wikipedia
A-Scow
In sailing, the A-Scow is a large sailing scow. It is 38 feet long and with reported top speeds of over 25 knots. With its rules of design, also known as scantlings, the A-Scow has a significant history. With a large sail area and little keel ballast, the five to seven crew members must work in unison on the A-Scow to keep the boat sailing fast and upright. The boat is mainly sailed in Minnesota and Wisconsin.