Jason Comeaux, Underwater Egress Training instructor, right, demonstrates how to breathe through an air regulator during UET on Camp Hansen, Okinawa, Japan, Feb. 9, 2017. Marines with Truck Company, Headquarters Battalion, 3rd Marine Division, III Marine Expeditionary Force, are required to complete UET as part of their pre-deployment training for Fuji Viper 17-3.

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