As astronomical observation improved by the late 18th century, nautical almanac tables became extremely precise, vital to navigation. In this country, almanacs proliferated and settled into a ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of ...

And that was once a very big deal. Indeed, before the Guide and Almanac, the world had a deadly longitude problem. Navigation at sea was extremely difficult, resulting in countless disasters and ...

IN 1936 the Nautical Almanac Office undertook, by agreement with the Admiraity, the preparations of an "Air Aimanac" and of "Astronomicai Navigation Tables" for astronomical navigation in the air.

The “Abridged Nautical Almanac” already gives to the surface navigator the astronomical data required to an accuracy of 0·1´ or 0·2´, but involves certain interpolations and conversions ...