190408-N-KV163-1025 GREAT LAKES (April 8, 2019) A crew member guides a Navy Reserve Assault Craft Unit-1 maritime prepositioning force utility boat assigned to Navy Operation Support Center Chicago into it’s berth at Naval Station Great Lakes. ACU-1’s mission includes the traditional assault and follow-on echelon operations to support the Global War on Terrorism as well as independent multi-day anti-piracy patrols, visit-board-search and seizure operations, oil platform defense, humanitarian assistance and disaster relief (U.S. Navy photo by Mass Communication Specialist 1st Class John Sorensen/Released)