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THULE AIR BASE, Greenland (April 14, 2021) Steelworker 2nd Class Ken Lancaster, assigned to Underwater Construction Team (UCT) 1, surfaces through the emergency exit hole cut downstream from the main entry and exit hole as part of a UCT-1 training event. This dive was conducted using the DP2 surface supplied system with full face mask (FFM) Mark 20 Underwater Breathing Apparatus (UBA) and a variable volume dry suit for thermal protection. UCT-1 and and Naval Mobile Construction Battalion (NMCB) 1 are completing arctic exercise missions at Thule Air Base in Greenland. (U.S. Navy photo by Master Chief Josh Dumke)
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