The Galactic Empire: An Empire Reborn
Imperial Officers' Manual
Major Revision: 2.0 – 2008.10.31
An adaptation of the pre–Endor document and policies.
cylinders  RIP  cylinders
... A Captain's Rank Insignia ...

The rank of Captain (CP) is afforded to officers holding the position of ship captain onboard vessels of the Imperial fleet...

This is the standard – and by far the most common – variant of the rank... It is marginally subordinate to 'Line Captain', and in use on "smaller-scale" capital ships (those with fighter capacities of less than one full wing (6 squadrons/72 pilots)).