Munro underway with small boat Crew members aboard the Coast Guard Cutter Munro, a 418-foot national security cutter, and its small boat transit the Gulf of Mexico, Feb. 12, 2017. National security cutters allow crews to protect U.S. borders. Coast Guard photo by Seaman Courtney Fussell SHARE: Download: Full Size (0.8 MB) Tags: border protection, nsc, national security cutter, coast guard Credit: eaman Courtney Fussell. VIRIN: 170212-G-G0200-001.JPG Photo Gallery