[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"legacy-detail-navy-CM":3},{"code":4,"branch":5,"codeSystem":6,"events":7},"CM","navy","RATING",[8,29,41],{"title":9,"status":10,"effectiveFrom":11,"effectiveTo":12,"successors":13,"citations":16,"notes":28},"Construction Mechanic","merged",null,"1964",[14],{"code":15,"liveCode":11,"name":11},"EQCM",[17,23],{"title":18,"url":19,"accessedAt":20,"sourceDate":21,"locator":22},"Charles A. Malin/Bureau of Naval Personnel, Compilation of Enlisted Ratings and Apprenticeships, U.S. Navy, 1775 to 1969 (rev. Dec. 1969)","https://web.archive.org/web/20240704193222id_/https://www.history.navy.mil/research/library/online-reading-room/title-list-alphabetically/c/enlisted-ratings-in-u-s-navy-1775-1969.html","2026-07-30","1969-12","#anchorm, Master Chief Equipmentman entry; reproduced on archived Ohio PDF p. 10",{"title":24,"url":25,"accessedAt":20,"sourceDate":26,"locator":27},"Charles A. Malin/Bureau of Naval Personnel, Abbreviations Used for Navy Enlisted Ratings (1970)","https://web.archive.org/web/20210825164342id_/https://www.history.navy.mil/research/library/online-reading-room/title-list-alphabetically/a/abbreviations-used-for-navy-enlisted-ratings.html","1970","alphabetic abbreviation list, CM, EQCM entries","Malin/BUPERS source assertion: Established 1964; combination of CM and EO ratings at E-9. Normalized as merged/included. The source explicitly limits this combination to pay grade E-9; it does not assert that lower-pay-grade use of the predecessor rating ended.",{"title":30,"status":31,"effectiveFrom":11,"effectiveTo":32,"successors":33,"citations":35,"notes":40},"Mechanic","renamed","1958",[34],{"code":4,"liveCode":4,"name":9},[36,38],{"title":18,"url":19,"accessedAt":20,"sourceDate":21,"locator":37},"#anchorc, Construction Mechanic entry; #anchorm, Mechanic entry; reproduced on archived Ohio PDF p. 6, 10",{"title":24,"url":25,"accessedAt":20,"sourceDate":26,"locator":39},"alphabetic abbreviation list, CM entry","Malin/BUPERS source assertion: Changed from Mechanic 1958. | changed to Construction Mechanic 1958. Normalized as renamed/changed. Reconciles 2 reciprocal, grade-specific, or repeated source assertions for the same predecessor/date.",{"title":42,"status":10,"effectiveFrom":11,"effectiveTo":43,"successors":44,"citations":48,"notes":53},"Carpenter's Mate","1948",[45],{"code":46,"liveCode":46,"name":47},"DC","Damage Controlman",[49,51],{"title":18,"url":19,"accessedAt":20,"sourceDate":21,"locator":50},"#anchorc, Carpenter's Mate entry; #anchord, Damage Controlman entry; reproduced on archived Ohio PDF p. 5, 6",{"title":24,"url":25,"accessedAt":20,"sourceDate":26,"locator":52},"alphabetic abbreviation list, CM, DC entries","Malin/BUPERS source assertion: changed to Damage Controlman 1948. | Established 1948 from the ratings of Specialist (F) (Fire Fighters), Carpenter's Mate, Carpenter's Mate (SR) (Joiners), Carpenter's Mate (SR) (Builders), and Painter. Normalized as merged/included. Reconciles 2 reciprocal, grade-specific, or repeated source assertions for the same predecessor/date."]