These ranks have not been seen on-screen and are non-canon. However, their appearance is implied by the appearance of other canon ranks or based upon current US Navy rank parlance.
↑Chief petty officers of all grades wore the same insignia.
↑ 3.03.1When this rank scheme was first introduced, Captains wore one sleeve stripe like all other officers. In the later stages of this rank style, Captains wore two stripes while other officers still wore only one stripe.