Archaeoastronomy is the interdisciplinary study of prehistoric, ancient, and traditional astronomies within their cultural context. Its sources include both written and archaeological remains and it embraces calendrics, practical observation, sky lore, celestial myth, and more. Its true scope establishes it as an "anthropology of astronomy."
How does this relate to maritime history? Well, the only photo included is The Antikythera Mechanism, discovered on a sunken Greek ship.