 An electro-optics ordinance repairer performs maintenance and repair to ground ordinance laser and night vision systems, small missile systems and other equipment. These marines from fire control on Camp Hanset moved to the field to practice their skills. We have about 15 marines out here for about a week. During this time, the skill sets that they develop in different systems are going to just enable them to carry on the great reputation that 2171s have both here and three math throughout the whole Marine Corps. The MOS is divided into four main parts, artillery, night vision equipment, small missiles and organics. Out of the entire manpower in the Marine Corps, only 516 marines are qualified for this MOS. Marine Corporal Elisa Helen, Camp Hansen, Okinawa.