The Black Sun's transports became a common sight in both the underworld and legitimate shipping with the advent of Xizor Transport Systems. This particular transport class became well known as lightly defended. Pirates from a variety of bands began picking off the freighters, particularly those smuggling illegal cargo for Black Sun. Instead of dedicating fighters to escort transports carrying valuable cargo, Black Sun began modifying some of their transports to carry heavy firepower and act as escorts for the rest of the convoys. Named after Black Sun's lieutenants, the Vigo, this once-merchant class vessel has been elevated to the status of "gunship."