Hagoth did not set sail in his ships, but rather stayed behind as a shipbuilder. His first ship was successful, because it returned. The round trip came after somewhat less than one year. It is doubtful that all of that time, or even most of it, was on the ocean. The voyage would have taken the people to some location, and then they would have spent some time there before sending the ship back. Unfortunately, the data are so vague that we cannot get any idea of distance from the fact of the return.