Description
Sight Reduction Tables – Pub. 229 Volume 5 is a classic nautical publication developed for use in astronomical navigation at sea. The table is part of the Sight Reduction Tables for Marine Navigation series (Pub. 229), which is used by navigators to calculate position using observations of celestial bodies.
The publication is used in conjunction with the Nautical Almanac, sextant and an accurate chronometer to reduce observations of the sun, moon, planets and navigational stars to a position line on the chart. Using pre-calculated trigonometric tables, the navigator can quickly look up the altitude and azimuth of a celestial body without having to perform extensive mathematical calculations. This makes Sight Reduction Tables a convenient and reliable tool for traditional navigation, especially in situations where electronic navigation systems are not available.
Pub. 229 Volume 5 covers latitudes from 60° to 75°, and is therefore particularly relevant for navigation in high latitudes. Together with the other volumes in the series, Sight Reduction Tables provides global coverage for astronomical navigation at sea.
The tables are structured for efficient use on board, with systematic lookups that make it easy to find the necessary navigation data on the move. Sight Reduction Tables Pub. 229 remains a key reference work in classical astronavigation, and is used both in maritime education and by sailors who want an independent navigation method based on sky observations.
