The Nautical Almanac for the Year 1981: For Training Purposes Only - Hardcover

by Usno Nautical Almanac Office (Author), H. M. Nautical Almanac Office (Author)

Data in this book are no longer valid for navigation. It is preserved in print because many training programs (including USCG and US Navy ) use examples from 1981 to teach celestial navigation. USCG license exams require data from this almanac. These exams also require Sight Reduction Tables, Pub 229, Vol. 2 and a 2102-D Star Finder.