U.S. Marine Corps Instructors of Water Survival and graduates of the Water Survival Advanced course pose for a group photo on Marine Corps Air Station Futenma, Okinawa, Japan, July 22, 2022. WSA is the highest swim qualification that Marines can obtain before becoming Marine Corps Instructors of Water Survival. Throughout the course, students endured aquatic conditioning, endurance swimming, and underwater rescue training. - U.S. Marine Corps Instructors of Water Survival and graduates of the Water Survival Advanced course pose for a group photo on Marine Corps Air Station Futenma, Okinawa, Japan, July 22, 2022. WSA is the highest swim qualification that Marines can obtain before becoming Marine Corps Instructors of Water Survival. Throughout the course, students endured aquatic conditioning, endurance swimming, and underwater rescue training.