Crewman

Crewman is the third enlisted rank of the UNSC Navy, equal in rank to Lance Corporal in the UNSC Marine Corps. They do a variety of jobs on UNSC ships, such as driving and maintaning the ship. They also control the weaponry and possibley are givin pistols to fend of boarders. They only appear in the first to levels of Halo: Combat Evovled, and in one level of Halo 3. They wear uniforms with different colors on them, this may signifie rank or job on the ship. Not much else is known about them.