190722-N-KK394-1016 KEY WEST, Fla. (July 22, 2019) Bruce Connor, left, chief mate of the Military Sealift Command expeditionary fast transport vessel USNS Spearhead (T-EPF 1), and General Dynamic marine operations engineer Dan McDonald prepare a Knifefish unmanned undersea vehicle (UUV) to be transported by crane aboard Spearhead. Knifefish is a medium-class mine countermeasure UUV designed for deployment off the littoral combat ship. (U.S. Navy photo by Mass Communication Specialist 2nd Class Anderson W. Branch/Released)