The “solar barge” is a mythological representation of a Sun that rides a boat. Representations of solar barges can be traced to the neolithic era (approx 10,000 B.C. to 2,000 B.C.). It is a mythic representation which continued into Ancient Egypt, Greece, Rome, and it is found in other mythologies around the world as well.(Wikipedia: solar deity)
The Khufu ship, for example, is an intact full-size ritual vessel that was sealed into a pit at the foot of the Great Pyramid of Giza around 2500 B.C. It is a type of solar barge designed to carry the resurrected king Khufu with the sun god Ra across the heavens.
The Jim Jarmusch movie, Dead Man, evokes the concept of a solar barge as Johnny Depp’s character, William Blake, is ceremonially set off into the Pacific Ocean by Gary Farmer’s character, “Nobody.”