Drone Prep Sailors prepare an unmanned underwater vehicle in the Persian Gulf, Dec. 6, 2018, during Mine Countermeasures Exercise 19-1, a training event with the British Royal Navy. SHARE IMAGE: Download Image: Full Size (1.24 MB) Tags: Navy Photo By: Navy Petty Officer 2nd Class Kevin J. Steinberg VIRIN: 181206-N-TB177-1147C.JPG Photo Gallery