Sisko's lightship was a replica of a Bajoran lightship constructed by Commander Benjamin Sisko in 2371. The only modern technology added was artificial gravity, as Sisko claimed weightlessness made him queasy.
Sisko's inspiration for building this craft was his study of ancient Bajoran texts. He and his son, Jake, would later successfully emulate the journey from Deep Space 9 to Cardassia, making use of the natural tachyon eddys of the Denorios Belt and confirming the ancient texts. Upon their arrival, they encountered three Galor-class warships, lead by Gul Dukat, who revealed the discovery of the ancient crash site of the original ship, and would celebrate Sisko's arrival with a fireworks display. (DS9: "Explorers")