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Sixth-millennium starfighters are obsolete spacecraft that the Proteus enforcers use to patrol and defend Proteus. Croad pilots such a craft, pursuing a sixth-millennium shuttle smuggling ambrosa (TOS: "The Long Patrol").
- Although apparently 1,000 yahrens older, the design of the sixth-millennium starfighter is extremely similar to that of the Colonial Viper. The sixth-millennium starfighter fuselage is much more squat and has two engines rather than three. It, like the Viper, is armed with a pair of laser cannons.