Sailor Survey A sailor surveys Ukibaru Island during Exercise Poseidon’s Watchtower in Okinawa, Japan, June 9, 2021. Marines and sailors conducted a reconnaissance of the island to hone their skills in assessing terrain for the suitability of supporting maritime operations. SHARE: Download: Full Size (1.23 MB) Tags: Poseidon, Marines Corps, Navy, Indo-Pacific Credit: Marine Corps Sgt. Hailey Clay VIRIN: 210609-M-LR229-0005C.JPG Photo Gallery