Jason's Vessel is the ARGO, a ship in Greek mythology. It was built by the Argonauts, a band of heroes led by Jason, to retrieve the Golden Fleece from Colchis. The ARGO was constructed with the help of the god Hephaestus and was said to be the first ship to sail the seas. It was made of the finest materials and was equipped with oars and sails. The ARGO was also said to be the first ship to have a speaking trumpet, which allowed Jason to communicate with his crew.