Capt. Fredrick Monday, the commanding officer of Combat Assault Company, 3rd Marine Regiment, 3rd Marine Division, treads water after escaping a Submerged Vehicle Egress Trainer (SVET) during Underwater Egress Training (UET), Marine Corps Base Hawaii, July 21, 2017. In the event of an Amphibious Assault Vehicle sinking, SVET and UET are vital training programs that prepares Marines and Sailors on safely escaping the vehicle. (U.S. Marine Corps photo by Lance Cpl. Matthew Kirk) - Capt. Fredrick Monday, the commanding officer of Combat Assault Company, 3rd Marine Regiment, 3rd Marine Division, treads water after escaping a Submerged Vehicle Egress Trainer (SVET) during Underwater Egress Training (UET), Marine Corps Base Hawaii, July 21, 2017. In the event of an Amphibious Assault Vehicle sinking, SVET and UET are vital training programs that prepares Marines and Sailors on safely escaping the vehicle. (U.S. Marine Corps photo by Lance Cpl. Matthew Kirk)

Capt. Fredrick Monday, the commanding officer of Combat Assault Company, 3rd Marine Regiment, 3rd Marine Division, treads water after escaping a Submerged Vehicle Egress Trainer (SVET) during Underwater Egress Training (UET), Marine Corps Base Hawaii, July 21, 2017. In the event of an Amphibious Assault Vehicle sinking, SVET and UET are vital training programs that prepares Marines and Sailors on safely escaping the vehicle. (U.S. Marine Corps photo by Lance Cpl. Matthew Kirk) - Capt. Fredrick Monday, the commanding officer of Combat Assault Company, 3rd Marine Regiment, 3rd Marine Division, treads water after escaping a Submerged Vehicle Egress Trainer (SVET) during Underwater Egress Training (UET), Marine Corps Base Hawaii, July 21, 2017. In the event of an Amphibious Assault Vehicle sinking, SVET and UET are vital training programs that prepares Marines and Sailors on safely escaping the vehicle. (U.S. Marine Corps photo by Lance Cpl. Matthew Kirk)