Navy Petty Officer 2nd Class Christopher Walters, a hospital corpsman with 3rd Medical Battalion, 3rd Marine Logistics Group, conducts a rifle swim during the water survival advanced course on Marine Corps Air Station Futenma, Okinawa, Japan, June 17, 2021. WSA is the highest swim qualification Marines and sailors can obtain before moving onto the next echelon of becoming a Marine Corps Instructor of Water Survival. The week-long course kicks off with a water survival pre screening event, and the remainder of the course consists of numerous endurance swims, life-saving techniques and applications, physical and mental conditioning, and countless swimming drills to ensure students have the confidence to not only maintain themselves but others’ lives while in the water. Walters is a native of Upland, California. - Navy Petty Officer 2nd Class Christopher Walters, a hospital corpsman with 3rd Medical Battalion, 3rd Marine Logistics Group, conducts a rifle swim during the water survival advanced course on Marine Corps Air Station Futenma, Okinawa, Japan, June 17, 2021. WSA is the highest swim qualification Marines and sailors can obtain before moving onto the next echelon of becoming a Marine Corps Instructor of Water Survival. The week-long course kicks off with a water survival pre screening event, and the remainder of the course consists of numerous endurance swims, life-saving techniques and applications, physical and mental conditioning, and countless swimming drills to ensure students have the confidence to not only maintain themselves but others’ lives while in the water. Walters is a native of Upland, California.