Description: If you are a performance sailor, visit the Annapolis Performance Sailing website to find a wide selection of performance sailboat parts and equipment. Whether you are shopping for racing blocks, sailing thimbles or ferrules, APS has the equipment you need for your sailboat. In addition to sailing parts, APS also sells clothing that is designed for the performance sailor and their comfort. APS is a Maryland based company and can also be reached by calling 800-729-9767.