170516-N-DY073-0208 ANNAPOLIS, Md. (May 16, 2017) A plebe crawls through a human tunnel during the class of 2020 Sea Trials at the U.S. Naval Academy in Annapolis, Md. Sea Trials is a capstone event for the freshman midshipmen, modeled after the Marine Corps' crucible and the Navy's Battle Stations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Brianna Jones/Released)