[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"legacy-detail-marines-0491":3},{"code":4,"branch":5,"codeSystem":6,"events":7},"0491","marine_corps","MOS",[8],{"title":9,"status":10,"effectiveFrom":11,"effectiveTo":12,"successors":13,"citations":17,"notes":24},"Title not stated in source","converted",null,"2003",[14],{"code":15,"liveCode":15,"name":16},"0451","Airborne and Air Delivery Specialist",[18],{"title":19,"url":20,"accessedAt":21,"sourceDate":22,"locator":23},"MARADMIN 446/03, FY04 Military Occupational Specialty Conversions","https://web.archive.org/web/20190918164707id_/https://www.marines.mil/News/Messages/Messages-Display/Article/893913/fy04-military-occupational-specialty-conversions","2026-07-29","2003-09-24","MARADMIN 446/03, para 2 table","The cited source prints the MOS code but not its occupational title; no title was inferred. GySgt-MGySgt; source says conversion changes had already been completed, so original effective date is unresolved. The message says this conversion was already completed but gives no original date; year-only precision is retained."]