170827-M-PD152-0020 INDIAN OCEAN (Aug. 27, 2017) Cmdr. Theodore Essenfeld, commanding officer of the amphibious dock landing ship USS Pearl Harbor (LSD 52), observes the Indian navy Talwar-class frigate INS Trikand (F51) during a passing exercise as part of bilateral interoperability drills. The bilateral drills are designed to enhance interoperability between the two navies and emphasize the importance of communications and coordination while operating together at sea. (U.S. Marine Corps photo by Gunnery Sgt. Thomas Davis Jr./Released)