Star Trek: Nautilus
Uniforms and Insignia
U.S.S. Nautilus is launched at a time of transition in many fields, including uniforms. While many Starfleet officers and personnel still wear the Crimson uniforms featured in Star Trek II-VI, a new uniform has been introduced in 2334 that many of the new crews have adopted.
The NCO uniform remains the same as those seen in Star Trek II-VI:
The same rank insignia are still used:
Here is the Older uniform, still seen by many on star bases and commands which do no have frequent contact with sector 001: