Our US SAILING Basic Keelboat (BK) Certification course consists of five+ days of sailing instruction. US Sailing only requires three days; we go beyond. Designed for you to progress from a beginner to a winner, BK course features the top quality instructors, boats, and location for developing your skills. A US SAILING Keelboat Instructor and up to three students are on the water in one of our J22s. They are 22-foot keelboats that are safe, comfortable, and fun.