Sight Reduction Tables Vol 1

Volume I of a 3-volume set. Precomputed tables for use by air navigators, although they are commonly used by surface navigators where their greater convenience offsets the less precise positional data derived. This lessened precision is of little importance at sea. The first volume is designed for use with certain selected stars on a world-wide basis. Because of the change in the angle of the earth's axis over time, the data is tabulated to cover a specific period with an auxialiary table for correction. This edition is tabulated with a base year of 2007.