The Liberator was an abandoned spacecraft found drifting near Cygnus Alpha, it was equipped with powerful weapons, force field protection, and a system of "battle computers". The ship was originally built by a race of beings known as "The System". The System referred to the ship as DSV2 ("Deep Space Vehicle 2")
Liberator was destroyed after passing through a cloud of corrosive micro-organisms in the third season final episode "Terminal"
Some girls should not liberate man..they simply don't have the right boobs for that.