Lt. Thomas D. Hallam, executive officer of Underwater Construction Team One (UCT ONE), dons a Kirby Morgan 37 dive helmet during diver training aboard USAV Matamoros (LCU-2026). Diver training is a two-week, joint training evolution between UCT ONE and Underwater Construction Team Two designed to reinforce standard operating procedures, qualify personnel, maintain proficiency, and evaluate dive protocol during scuba, surface supplied and recompression chamber operations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Nicholas S. Tenorio/Released)