British Nautical Almanac

The British Nautical Almanac is an annual publication that provides essential information for navigation at sea. It includes data such as tidal predictions, sunrise and sunset times, and the positions of celestial bodies like stars and planets. Sailors and navigators use this information to plot their courses and ensure safe travel across oceans. First published in 1767, the almanac is crucial for accurate celestial navigation, allowing mariners to determine their positions by observing the sky, especially before the advent of advanced GPS technology. It remains relevant for both professional and recreational sailors today.