Navigation. Hourglass. Until the eighteenth century, unique watches that could be used in navigation were hourglasses. The work schedule of the boats was organized by the clocks. Exemplary lasting 4 hours. Norwegian Maritime Museum. Oslo. Norway.
Navigation. Hourglass. Until the eighteenth century, unique watches that could be used in navigation were hourglasses. The work schedule of the boats was organized by the clocks. Exemplary lasting 4 hours. Norwegian Maritime Museum. Oslo. Norway.