What is the importance of "the Argo" in the book, The Argonauts?

In Greek Mythology, the Argo was a sailing ship that, according to legend, was co-designed by the goddess Athena and protected by the goddess Hera. The ship was sent on a mission to retrieve the powerful Golden Fleece, which magically conferred the power to rule on whoever found it. Members of the Argo's crew were called The Argonauts, suggesting that the book's title, and the characters, refer to a similar sort of mission or voyage - in this case, their goal being the Golden Fleece of identity.