Machinist's Mate (CB) (Equipment Operators) · Split into CD, CM, effective 1948
Malin/BUPERS source assertion: Established 1948 from the rating of Machinist's Mate (CB) (Equipment Operators). | Established 1948 from the ratings of Machinist's Mate (CB) (Equipment Operators) and Motor Machinist's Mate. Normalized as split/multi-destination. Reconciles 2 reciprocal, grade-specific, or repeated source assertions for the same predecessor/date. One or more historical long-title variants were normalized to a reviewed companion-list abbreviation by similarity match; the intermediate ledger records the method and the audit lists the source anomalies.
Sources
- Charles A. Malin/Bureau of Naval Personnel, Compilation of Enlisted Ratings and Apprenticeships, U.S. Navy, 1775 to 1969 (rev. Dec. 1969) (#anchord, Driver entry; #anchorm, Mechanic entry; reproduced on archived Ohio PDF p. 7, 10)
- Charles A. Malin/Bureau of Naval Personnel, Abbreviations Used for Navy Enlisted Ratings (1970) (alphabetic abbreviation list, MM(CBE), CD, CM entries)