MARBLEHEAD YACHTS--also called M or 50/800. The Marblehead is a medium-sized yacht providing exciting performance and the ability to handle most sailing conditions if rigged properly. This development class is restricted in overall length and sail area. The Marblehead is considered the leader in the use of advanced contruction materials and techniques. 50" long, 800 sq. inches in sail and area. For further information on the Marblehead class go to AMYA website. You will find the AMYA website on the first page of this Website,in Links section.