Two Marines with Weapons Company, Battalion Landing Team, 3rd Battalion, 2nd Marine Regiment, 22nd Marine Expeditionary Unit, train with the Shallow Water Egress Trainer chair while Marines in the Modular Amphibious Egress Trainer, also known as the "helo dunker," prepare to drop into the water during the SWET course, Dec. 8 - 9, aboard Camp Lejeune, N.C. The course taught the Marines to escape a helicopter in the event of a water landing.