magic ship Arthur

Reluctantly, King Arthur gave his consent. 'It seems to me', he added, 'that the girl spoke of coming across the sea to this shore on her journey. Therefore I bid you take the magical ship, which was given to me as gift by the Queen of the Land-Under-Wave, for it has the ability to take you wherever you wish to go. Step into it and say that you would be taken to the home of the Knight of Music, and it shall be done.'
So Eagle Boy gave thanks to the king and went aboard the magical craft. He gave it as his wish that he be taken to the country of the Knight of the Music and at once the boat set sail of its own accord, and flew across the seas until it reached an island.
There it grounded on the shore and Eagle Boy hid it from sight. Then he set out to explore the island and soon found himself outside the walls of a castle.

 The book of Arthur : lost tales from the Round Table - John Matthews