Master sergeant was a military rank, a traditional infantry or army enlisted grade held by a non-commissioned officer. In comparison to naval ranking systems, this rank was approximately equivalent to the naval chief petty officer or senior chief petty officer grades.
On a planetary duplicate of Earth, a boy named Jahn wore a master sergeant patch, among others, on his jacket. (TOS: "Miri")
The insignia seen on Jahn's jacket was styled like a US Army master sergeant – three chevrons above and three rockers below, with no center insignia – sewn onto US Marine Corps colors, pre-1959 style insignia.
According to the Star Trek Encyclopedia (4th ed., vol. 2, p. 9), major sergeant was a rank in the Military Assault Command Operations in the 2150s. The insignia for this rank was on display in a diagran of MACO rank and insignia.
| Enlisted personnel | Commissioned officers | Generals and flag officers | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fleet: | CRM | PO | CPO | MID CDT OC | ENS | LT JG | LT | LT CMDR | CMDR | CAPT | FCAPT | CDORE | RADM | VADM | ADM | FADM | ||||
| Military: | PVT AMN | CPL | SGT | SSGT | MSGT 1SGT | 2nd LT | 1st LT | CAPT | MAJ | LT COL | COL | BRIG | MAJ GEN | LT GEN | GEN | MARSHAL | ||||
| Positions: | Boatswain • Chief • Corpsman • Engineer's mate • Specialist • Technician • Yeoman | TAC • SO • 3rd • 2nd • 1st • CO • DD | Portmaster • Chief of Staff • CinC | |||||||||||||||||
| Services: | Andorian • Bajoran • Cardassian • Ferengi • Jem'Hadar • Klingon • Romulan • SS • United Earth MACO • United Earth/Federation Starfleet • United States • Vulcan Mirror universe: Terran Empire Starfleet • Terran Empire MACO | |||||||||||||||||||
This chart shows only general equivalencies based on the ranks used by many governments on Earth, as well as the rest of the galaxy.
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