Keywords: Four Avenger-class mine countermeasure ships sail in the Arabian Gulf on 6 December 2016.JPG en The U S Navy Avenger-class mine countermeasure ships USS Dextrous MCM-13 USS Gladiator MCM-11 USS Devastator MCM-6 and USS Sentry MCM-3 part of Commander Task Force CTF 52 sail in formation as part of a photo exercise in the Arabian Gulf 2016-12-06 161206-N-ZV163-0371 Navy http //www navy mil/view_image asp id 229515 U S Navy photo by Petty Officer 2nd Class Christina Brewer PD-USGov-Military-Navy USS Sentry MCM-3 USS Devastator MCM-6 USS Gladiator MCM-11 USS Dextrous MCM-13 Groups of naval ships of the United States |