Baltic Ops The USS Gravely approaches a German navy tanker before a replenishment in the Baltic Sea, June 4, 2019. The Gravely is conducting maritime operations for NATO. SHARE IMAGE: Download Image: Full Size (1.78 MB) Tags: European Security, navy, partnerships, nato Photo By: Navy Petty Officer 2nd Class Mark Andrew Hays VIRIN: 190604-N-JX484-040.JPG Photo Gallery