Argo in Greek mythology was the ship being boarded by the Argonauts from Iolkos (situated near Volos) to Colchis, (situated at the Black Sea) to go and get the Golden Fleece. It took her name from its manufacturer, Argus, son of Phrixus and Chalkiopi.
The construction of Argo was, according to legend, at the request of the leader of the campaign Jason. The ship described as the fastest and most robust vessel of her time. It was also extremely lightweight to provide portability at the land by her crew. Some more detailed sources indicate the length of the ship in 50 to 60 feet (μακρά ναύς = long ship). Captain of the ship was Tifys.The capacity of the vessel is a point at which there are significant differences between the various narratives. Some sources indicate positions for sixty rowers, others fifty (pentikontiris) and others for less.
Also it is reported that the goddess Athena (or Hera) placed on the bow of the ship one branch of Oak from Dodoni. This branch had prophetic qualities, he spoke with a human voice and warned the Argonauts for the anticipated risks.
(Translation from Wikipedia)