Sight Reduction Tables for Air Navigation Latitudes 0-40, Declinations 0-29; Pub. No. 249 Volume Two

The Sight Reduction Tables for Air Navigation (Pub 249) consist of three volumes of comprehensive tables of altitude and azimuth designed for the rapid reduction of astronomical sights in the air. This volume (Volume 2), for latitudes 0°-40°, and Volume 1 for latitudes 39°-89°, provide for sights of the Sun, Moon, and planets; these tables are permanent. (Volume 1 contains tables for selected stars for all latitudes, calculated for a specific epoch; it is intended for use for about 5 years, when it will be replaced by a new edition based on a later epoch.)