[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"legacy-detail-coast-guard-SM":3},{"code":4,"branch":5,"codeSystem":6,"events":7},"SM","coast_guard","RATING",[8],{"title":9,"status":10,"effectiveFrom":11,"effectiveTo":12,"successors":13,"citations":18,"notes":30},"Signalman","merged",null,"1948-04-02",[14],{"code":15,"liveCode":15,"name":16,"liveBranch":17},"QM","Quartermaster","navy",[19,25],{"title":20,"url":21,"accessedAt":22,"sourceDate":23,"locator":24},"Dana Lewis, U.S. Coast Guard Enlisted Ratings: Rating Specialty Marks & Distinguishing Marks, 1915-2015","https://web.archive.org/web/20220310222548id_/https://media.defense.gov/2020/Mar/27/2002271170/-1/-1/0/FINAL%20%20CG%20RATING%20&%20WARRANT%20MARKS%20DPL.PDF","2026-07-30","2016-12","printed p. 35 / PDF p. 36, Signalman (SM) entry",{"title":26,"url":27,"accessedAt":22,"sourceDate":28,"locator":29},"U.S. Coast Guard Bulletin, vol. 4, no. 3, September 1948, 'New Rating Structure'","https://archive.org/download/sim_coast-guard-bulletin_1948-09_4_3/sim_coast-guard-bulletin_1948-09_4_3.pdf","1948-09","article 'New Rating Structure,' printed pp. 25-26 / PDF pp. 5-6","MEDIUM CONFIDENCE, operator-approved dual-cited exception. Lewis supplies the directional statement 'Merged into QM' and the 1941-1948 Signalman span; its printed p. 1 says the compilation is not an official reference guide. The contemporaneous September Bulletin says the Coast Guard effected its new rating structure on 2 April 1948 and that active QM personnel covered both quartermaster and signalman duties, while Reserve emergency QMQ and QMS remained distinct. The date is therefore tied to the overhaul; the missing implementing circular prevents high confidence."]