[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"legacy-detail-navy-MoMM":3},{"code":4,"branch":5,"codeSystem":6,"events":7},"MoMM","navy","RATING",[8],{"title":9,"status":10,"effectiveFrom":11,"effectiveTo":12,"successors":13,"citations":20,"notes":32},"Motor Machinist's Mate","split",null,"1948",[14,17],{"code":15,"liveCode":15,"name":16},"EN","Engineman",{"code":18,"liveCode":18,"name":19},"CM","Construction Mechanic",[21,27],{"title":22,"url":23,"accessedAt":24,"sourceDate":25,"locator":26},"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","#anchore, Engineman entry; #anchorm, Mechanic entry; #anchorm, Motor Machinist's Mate entry; reproduced on archived Ohio PDF p. 7, 10, 11",{"title":28,"url":29,"accessedAt":24,"sourceDate":30,"locator":31},"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, MoMM, EN, CM entries","Malin/BUPERS source assertion: Re-established at all pay grades 1948 from the ratings of Motor Machinist's Mate, Motor Machinists's Mate (SR) (Diesel Engine Mechanics), and Motor Machinists's Mate (SR) (Gasoline Engine Mechanics). | Established 1948 from the ratings of Machinist's Mate (CB) (Equipment Operators) and Motor Machinist's Mate. | included in Engineman 1948. Normalized as split/multi-destination. Reconciles 4 reciprocal, grade-specific, or repeated source assertions for the same predecessor/date."]