The RS rating was established on October 1, 2019 with the renaming of the existing ship's serviceman (SH).The SH rating was established in February 1944 in four specialty ratings: Ship's serviceman B (barber) (SSMB), ship's serviceman C (cobbler) (SSMC), ship's serviceman L (laundryman) (SSML) and ship's serviceman T (tailor) (SSMT).In April 1948, the four specialty ratings were merged into a single rating. The rating abbreviation was changed to SH. SHs specialized as barbers, cobblers, laundrymen, store clerks or tailors in pay grades E-3 and E-4.