Master Chief Steam Propulsionman (SP) · Discontinued, effective 1968
Malin/BUPERS source assertion: disestablished 1968. Normalized as disestablished/canceled.
Sources
- Charles A. Malin/Bureau of Naval Personnel, Compilation of Enlisted Ratings and Apprenticeships, U.S. Navy, 1775 to 1969 (rev. Dec. 1969) (#anchorm, Master Chief Steam Propulsionman (SP) entry; reproduced on archived Ohio PDF p. 10)
- Charles A. Malin/Bureau of Naval Personnel, Abbreviations Used for Navy Enlisted Ratings (1970) (alphabetic abbreviation list, SPCM entry)