What type of data is found in the Nautical Almanac?

The Nautical Almanac contains vital astronomical data that is used for marine navigation. This publication provides essential information such as the positions of celestial bodies, including the sun, moon, planets, and stars, crucial for determining a vessel's position at sea. Mariners use this data to perform celestial navigation, allowing them to calculate their latitude and longitude based on observations of these celestial bodies.

While tide schedules are important for navigation, they are not included in the Nautical Almanac, as that information can be found in a tide table or related publications. Ship maintenance tips are practical guides for vessel upkeep and would be found in manuals or specialized literature rather than the Nautical Almanac. Weather forecasts, although crucial for planning and safety at sea, are provided by meteorological services and not included in the almanac. Thus, the correct choice emphasizes the core purpose of the Nautical Almanac as an astronomical reference for safe and effective navigation.