Equipment from Regional Dive Locker East is used during a training exercise at Base Portsmouth, April 22, 2013. The Regional Dive Locker East's main mission is homeland security but is also instrumental in providing diving capability for three primary areas: Ports and Waterways Coastal Security; Aids to Navigation; and ship husbandry and repair in remote Polar Regions. (U.S. Coast Guard photo by Petty Officer 2nd Class Walter Shinn)