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Like many other races and cultures, the Klingons use a hierarchy of ranks, titles and uniform insignia in military and service organizations. (FASA RPG - The Klingons modules: The Klingons: Star Fleet Intelligence Manual, The Klingons: Game Operation Manual)

The FASA RPG's rank insignia only superficially represent those seen in canon. With the exception of that game's insignia, there was no real cohesive visual system of showing Klingon character ranks in Star Trek, with most costume elements used and reused randomly throughout all Klingon appearances.

Rank insignia

general wear
enlisted/general wear Uniform lapel.[1]
enlisted
recruit[2] (bekk, "warrior"[3])/private second class[2] (mang[4]) Uniform insignia.[2]
crewman second class[2]/private first class[2] (mang[4]) Uniform insignia.[2]
crewman first class[2]/lance corporal[2] (Da'[4]) Uniform insignia.[2]
petty officer second class[2] (DevwI', "leader"[4]) Uniform insignia.[2]
petty officer first class[2] (DevwI', "leader"[4])/sergeant[2] (bu'[4]) Uniform insignia.[2]
chief petty officer[2]/sergeant major[2] Uniform insignia.[2]
student officers
cadet[2] Uniform insignia.[2]
line officers
ensign[2] (lagh[4])/second lieutenant[2] Uniform insignia.[2]
lieutenant junior grade[2]/first lieutenant[2] Uniform insignia.[2]
lieutenant[2] (Sogh[4])/captain (infantry)[2] Uniform insignia.[2]
lieutenant commander[2]/major[2] Uniform insignia.[2]
commander[2] (la'[4])/lieutenant colonel[2] Uniform insignia.[2]
captain[2] (HoD[4])/colonel[2] Uniform insignia.[2][5]
flag officers
commodore (totlh[4])/brigadier ('ech[4]) Uniform insignia.[2]
major general
admiral[2] ('aj[4])/general[2] (Sa'"[4])
fleet admiral

References

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