Sigma group

Sigma was a standard designation for Delta-class DX-9 stormtrooper transports found aboard Imperial warships or space stations.

A typical duty for these craft was disabling and boarding enemy craft, such as the BFF-1 Bulk Freighter Onece, or heavy rocket attack such as the assault on the Rebel cruiser Lulsla.

Another standard designation for Imperial DX-9s was Omega.

Appearances

 * Star Wars: TIE Fighter