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 0Â°-40Â°, and Volume 3 for latitudes 39Â°-89Â°, 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.

Sight Reduction Tables for Air Navigation Vol. 2 (pub 249)

Celestaire

The Sight Reduction Tables for Marine Navigation (Pub 229) is designed to facilitate the practice of celestial navigation at sea. The tables are primarily used with the intercept method of sight reduction by entering arguments of latitude, declination, and local hour angle and obtaining tabulated altitudes and azimuth angles. The tables are prepared and published by NIMA on an as-needed basis. This six-volume series of Sight Reduction Tables for Marine Navigation is designed to facilitate the practice of celestial navigation at sea by the Marcq Saint Hilaire or intercept method. The tabular data are the solutions of the navigational triangle of which two sides and the included angle are known and it is necessary to find the values of the third side and adjacent angle.

Sight Reduction Tables for Marine Navigation (Pub 229) VOL. 1

National Imagery And Mapping Agency

This is a standard set of tables designed for Marine navigation. Although there are 6 volumes in a set, only those pertaining to the latitudes anticipated need to be obtained. Their tabular data, being purely mathematical results, never go out of date. The latitudes listed for the Volumes work for either northern or southern hemisphere. This six-volume series of Sight Reduction Tables for Marine Navigation is designed to facilitate the practice of celestial navigation at sea by the Marcq Saint Hilaire or intercept method. The tabular data are the solutions of the navigational triangle of which two sides and the included angle are known and it is necessary to find the values of the third side and adjacent angle. The tables, intended for use with The Nautical Almanac, are designed for precise interpolation of altitude for declination by means of interpolation tables which facilitate linear interpolation and provide additionally for the effect of second differences when required.

Sight Reduction Tables for Marine Navigation-Commercial Edition (Latitudes 15-30, inclusive, Volume 2

Sight Reduction Tables for Marine Navigation Latitudes 30 - 45 degrees, Inclusive Pub NO. 229, Vol 3

National Imagery and Mapping

This is a standard set of tables designed for Marine navigation. Although there are 6 volumes in a set, only those pertaining to the latitudes anticipated need to be obtained. Their tabular data, being purely mathematical results, never go out of date. The latitudes listed for the Volumes work for either northern or southern hemisphere. This six-volume series of Sight Reduction Tables for Marine Navigation is designed to facilitate the practice of celestial navigation at sea by the Marcq Saint Hilaire or intercept method. The tabular data are the solutions of the navigational triangle of which two sides and the included angle are known and it is necessary to find the values of the third side and adjacent angle. The tables, intended for use with The Nautical Almanac, are designed for precise interpolation of altitude for declination by means of interpolation tables which facilitate linear interpolation and provide additionally for the effect of second differences when required.

Sight Reduction Tables For Marine Navigation 45-60, Inclusive Pub. No. 229 Volume 4

Pub. No. 229 VOL 5 : Sight Reduction Tables for Marine Navigation Latitudes 60-75 Inclusive

Sight Reduction Tables For Marin Navigation Pub. No. 229 Volume 6 75-90 Inclusive

These tables were designed for air navigation where weight and space are at a premium, however, they are very popular with sailors too due to the fact that Vol. 1 offers a speedier way to compute stars. The way the 6 volumes of 229 were combined into this 3 volume set is this: volumes 2 &amp; 3 cover all latitudes, but work only for declinations from 0° to 29° north or south. This covers the sun, moon, planets, and only those stars whose declinations fall into this range. Volume 1 contains some stars (whose declinations may be more than 29°) that are pre-selected for optimum viewing and direction. This volume is applicable for an 8 year period, centered on its Epoch date. The only drawback to this arrangement, is that it is possible that a star may be observed that is not one of the pre-selected ones, and whose declination is more than 29° north or south. This star, if observed on some unlikely occasion, say through a break in the overcast, could not be computed using the 249 tables. Nevertheless this remains the most popular tabular system in use. Because of the high price and spotty availabliity of the Government editions,Celestaire has reprinted these as Commercial Editions from official Government electronic files or software. They are economical, and sized at 90% of the originals. They have soft instead of hard covers and their smaller size of 8.5 x 11 inches is easier to carry and store. SW 2.1 lbs

Sight Reduction Tables for Air Navigation Pub. No. 249 (HO-249)- Epoch 2015

These tables were designed for air navigation where weight and space are at a premium, however, they are very popular with sailors too due to the fact that Vol. 1 offers a speedier way to compute stars. The way the 6 volumes of 229 were combined into this 3 volume set is this: volumes 2 & 3 cover all latitudes, but work only for declinations from 0° to 29° north or south. This covers the sun, moon, planets, and only those stars whose declinations fall into this range. Volume 1 contains some stars (whose declinations may be more than 29°) that are pre-selected for optimum viewing and direction. This volume is applicable for an 8 year period, centered on its Epoch date. The only drawback to this arrangement, is that it is possible that a star may be observed that is not one of the pre-selected ones, and whose declination is more than 29° north or south. This star, if observed on some unlikely occasion, say through a break in the overcast, could not be computed using the 249 tables. Nevertheless this remains the most popular tabular system in use.

Sight Reduction Tables 249 Vol.1 Selected Stars EPOCH 2025

Sight Reduction Tables for Air Navigation Pub. No. 249 (HO-249)- Epoch 2010

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