Book of Doors, third division. the solar boat. In the boat is a ram-headed god with a solar disc, representing the Sun god. This is the nocturnal form of the sun, a combination of Osiris and Ra. The god stands under a canopus protected by the great serpent Mehen, and holds a sceptre was. In front of him stands another serpent with protective functions. Also on the boat are the god Sia, in the bow, and the god Heka in the stern. The boat is pulled by four inhabitants of the Duat, the Dwawtyws.