Witchboat

One of these rowboat-sized wooden boats can hold three people. They move through the water effortlessly at a speed of 30 feet upstream or downstream and are guided by verbal commands from a person who knows the activation command word. A witchboat can even be ordered to return to a previous location without a pilot or passengers, and the sight of such empty boats is common in Rashemen. Crafted by the Witches and Old Ones, these boats do not work outside the boundaries of Rashemen.
A larger variety of the witchboat, called a warboat, is made by applying the same spells to a well-crafted felucca (a two-masted Rashemi sailing vessel), giving it a speed of 20 feet.
CL 7th; Craft Wondrous Item, freedom of movement, fly, permanency; Market Price: 20,000 (witchboat), 40,000 gp (warboat); Weight: -.
Source: Unapproachable East