SANTA RITA, Guam (Nov. 11, 2021) Seabees assigned to Naval Mobile Construction Battalion (NMCB) 1 Detachment Guam provide civil engineering support to Navy Mobile Diving and Salvage Unit (MDSU) 1 at the Guam Harbor of Refuge. (NMCB) 1 Detachment Guam is forward-deployed to execute construction, humanitarian assistance, and theater security cooperation in the U.S. 7th Fleet areas of operation. (U.S. Navy photo by Mass Communication Specialist 2nd Class Sean P. Rinner)