MTU is a small ship universe (LBB-2 ships) usinf HG chargen/rank structure. Therefore, I suggestOriginally posted by far-trader:
The old CT LBB5, High Guard had more rank definitions:
O1 - Ensign (basic rank 1)
O2 - Sublieutenant (basic rank 1)
O3 - Lieutenant (basic rank 2)
O4 - Lieutenant Commander (basic rank 3)
O5 - Commander (basic rank 4)
O6 - Captain (basic rank 5)
O7 - Commodore (basic rank 6)
O8 - Fleet Admiral (basic rank 6)
O9 - Sector Admiral (basic rank 6)
O10- Grand Admiral (basic rank 6)
I'd say the required rank would be dependant on the number of crew commanded. An easy method would be use the crew number for the ship and add 1 to it for the minimum rank. So...
the following guidelines for a small ship universe (IMTU it's the Solar Triumvirate):
Ensign (O1) - Lowest rank for a pilot; may commad only a boat.
Sublieutenant (O2) - Boat pilot/CO, or XO of a Lieutenant (or Lt.Cmdr.) of a ship.
Lieutenant (O3) - Lowest rank to command a ship; usually commands ships up to 400 dtons.
Lieutenant Commander (O4) - Commands ships up to 1,000 dtons.
Commander (O5) - May command shipsup to 2,000 dtons.
Captain (O6) - Commands Capital ships (abouve 2,000 dtons) or leads a Flight of Fighters/Boats/non-capital ships.
Commodore (O7) - Usually the immidiate commander of a flagship (overseeing the individual ship's operations under the Admiral) or of a Squadron (4-8) of ships.
Admirals (O8-O10) - Usually command groups or fleets rather than individual ships.
Note that despite a lower rank, anybody commanding a ship is referred to as "Captain". Also, anyone in a Pilot position must be an officer.
Chief Engineers, Chief Gunners as well as Medics are Petty Officers on small (below 1,000 dtons) ships; Doctors, and Chiefs on ships abouve 1,000 dtons are almost always officers.
Military space stations are considered as ships; semi-civilian stations (think Babylon 5; it was originally commanded by Sinclair, who was a Commander) may be commanded by an officer one level below that which is required by a military ship. Fully civilian stations are commanded by Corporate/Merchant officials/officers.