170809-N-WX059-0360 ARABIAN GULF (Aug. 9, 2017) The Avenger-class mine countermeasures ship USS Sentry (MCM 3), right, and the cyclone-class patrol coastal ship USS Thunderbolt (PC-12) participate in high-value asset escort training during Exercise Spartan Kopis. The Task Force 55-led exercise between the U.S. Navy and Coast Guard in is designed to increase tactical proficiency, broaden levels of cooperation, enhance mutual capability and support long-term security and stability in the region. (U.S. Navy photo by Mass Communication Specialist 2nd Class Sean Furey/Released)