Harbours are either natural or man-made, with the latter offering more services to seafaring adventurers. At a harbour, a captain may dock a ship, hire crew, purchase repairs, or arrange to have their ship stores replenished. They can also drydock a ship, taking it out of commission for any length of time. Some harbours offer the service of salvaging ships sunk upon the oceans by devious forces such as pirates or sea monsters. A ship in a bottle artefact, sold at auction in 594 AF, granted the ability to teleport either the captain or an entire ship to a broad range of island harbours.