Starfleet maintains a system of ranks inherited from Earth's ground and naval militaries. The rate symbols no longer dictate pay grade as they once did as economics works rather differently at this point, but they do help to make the hierarchy generic to facilitate translation into other languages and equivocation between ranking systems for civilian navies, shipping vessels etc. All ranks are shown on an administrative-track uniform colour for the sake of example; the cadet ranks are shown on the dark grey cadet division colour, as cadets do not specialise into a division until graduation.

C-1 First Year Cadet C-1
C-2 Second Year Cadet C-2
C-3 Third Year Cadet C-3
C-4 Fourth Year Cadet C-4
Enlisted Personnel
E-0 Recruit[1] E-0 naval Recruit[1] E-0 marine
E-1 Crewman 3rd-Class E-1 naval Private E-1 marine
E-2 Crewman 2nd-Class E-2 naval Private 1st-Class E-2 marine
E-3 Crewman 1st-Class E-3 naval Lance Corporal E-3 marine
E-4 Petty Officer 3rd-Class E-4 naval Corporal E-4 marine
E-5 Petty Officer 2nd-Class E-5 naval Sergeant E-5 marine
E-6 Petty Officer 1st-Class E-6 naval Staff Sergeant E-6 marine
E-7 Chief Petty Officer E-7 naval Gunnery Sergeant E-7 marine
E-8 Senior Chief Petty Officer E-8 naval Master Sergeant E-8 marine
E-9 Master Chief Petty Officer E-9 naval Sergeant Major E-9 marine
Line Officers
O-1 Ensign O-1 naval Second Lieutenant O-1 marine
O-2 Lieutenant (J.G.) O-2 naval First Lieutenant O-2 marine
O-3 Lieutenant O-3 naval Captain O-3 marine
O-4 Lieutenant Commander O-4 naval Major O-4 marine
O-5 Commander O-5 naval Lieutenant Colonel O-5 marine
O-6 Captain O-6 naval Colonel O-6 marine
Flag Officers
A-1 Commodore A-1 naval Brigadier General A-1 marine
A-2 Rear Admiral A-2 naval Major General A-2 marine
A-3 Vice Admiral A-3 naval Lieutenant General A-3 marine
A-4 Admiral A-4 naval General A-4 marine
A-5 Fleet Admiral A-5 naval Field Marshal A-5 marine
  1. 1.0 1.1 This rank is given to those in the one-year Starfleet enlisted program. Recruits specialise upon entry to the program and gain proficiency through work experience, whereas cadets specialise in the academy.