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PACIFIC OCEAN (June 20, 2017) Quartermaster Seaman Dianna Howze uses a sextant to measure the angle between the sun and the horizon aboard the Wasp-class amphibious assault ship USS Essex (LHD 2). The ship is conducting flight deck certifications and sea trials off the coast of Southern California. (U.S. Navy photo by Mass Communication Specialist Seaman Sabyn L. Marrs/Released)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/127906254@N06">National Museum of the U.S. Navy</a>
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