Petty Officer 2nd Class Paul Segura, a boatswain's mate, uses a chart and compass to plot the position of the Coast Guard Cutter Seneca during a transit through the East River, March 21, 2015, during a two month Mid-Atlantic Ocean patrol. Medium endurance cutters like the Seneca are built for multi-week offshore patrols, including operations requiring enhanced communications, and helicopter and pursuit boat operations, which provide a key capability for homeland security operations at sea. (U.S. Coast Guard photo by Petty Officer 2nd Class Sabrina Laberdesque)