A standard issue, Echo-class jumpship. Perfect for racers and daredevils.
Military units will sometimes use one of the letters as their designation (for example, ‘Bravo Company’)
Individual personnel may refer to themselves or others in the military alphabet over radios; “Echo-6-Charlie” would be someone whose pay-grade is E-6, with a last name beginning with the letter C.
Alternately, the number is code for a position within the unit
6 usually being commander