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 which are 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)