Petty Officer 1st Class Fernando del Cid and Petty Officer 3rd Class Jason Frayne, both aviation electronics technicians, review a wiring diagram while performing maintenance on a MH-60 Jayhawk helicopter in the hangar at Coast Guard Sector Columbia River, Mar. 26, 2017. This is only one of the many tasks performed during this particular maintenance period. U.S. Coast Guard photo by Petty Officer 1st Class Zac Crawford.