Steelworker 3rd Class Reagan Kempt, assigned to Naval Mobile Construction Battalion 1 (NMCB 1) Detachment Guam, attaches antenna extensions to an AT-420 antenna at Naval Base Guam April 25, 2017. AT-420s utilize ultra high frequency (UHF) and very high frequencies (VHF) to increase communication abilities. NMCB 1 Detachment Guam is a Commander, Task Force 75 unit that provides expeditionary construction and engineering support to expeditionary bases and responds to humanitarian assistance disaster relief requests.

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