180315-N-ZP059-0010 BREMERTON, Wash. (March 15, 2018) Steve Mastel, an electrician from the Puget Sound Naval Shipyard, talks with students from Sidney Glen Elementary School about frequency generators during a Navy Science, Technology, Engineering and Mathematics (STEM) day at the Puget Sound Navy Museum. Navy STEM Days are a part of an educational program resulting from collaboration between the museum, the Naval Undersea Museum, the Puget Sound Naval Shipyard and Intermediate Maintenance Facility, and the Naval Undersea Warfare Center Division Keyport. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jacob G. Sisco/Released)