{"title":"Sight Reduction Tables","description":"","products":[{"product_id":"sight-reduction-tables-for-marine-navigation-pub-no-229-ho-229-commercial-edition","title":"SIGHT REDUCTION TABLES FOR MARINE NAVIGATION Pub. No. 229 (HO-229) - Commercial Edition - Book","description":"\u003cspan\u003eThe Sight Reduction Tables for Marine Navigation (Pub 229) is published in six Volumes, each of which contains two eight-degree zones of latitude with a one-degree overlap between Volumes. They are designed to facilitate the practice of celestial navigation at sea.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe 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 NGA on an as needed basis.\u003c\/span\u003e\u003cdiv class=\"pc-book-specs\"\u003e\n\u003ch4\u003eBook Details\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 8.5 x 11 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Paperback\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePublisher\/Distributor:\u003c\/strong\u003e Celestaire\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Celestaire","offers":[{"title":"Volume I Latitudes 0-15","offer_id":67856646766837,"sku":"CEL002","price":29.95,"currency_code":"USD","in_stock":true},{"title":"Volume II Latitudes 15-30","offer_id":67856646799605,"sku":"CEL003","price":29.95,"currency_code":"USD","in_stock":true},{"title":"Volume III Latitudes 30-45","offer_id":67856646832373,"sku":"CEL004","price":29.95,"currency_code":"USD","in_stock":true},{"title":"Volume IV Latitudes 45-60","offer_id":67856646865141,"sku":"CEL005","price":29.95,"currency_code":"USD","in_stock":true},{"title":"Volume V Latitudes 60-75","offer_id":67856646897909,"sku":"CEL006","price":29.95,"currency_code":"USD","in_stock":true},{"title":"Volume VI Latitudes 75-90","offer_id":67856646930677,"sku":"CEL017","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/2198\/0149\/files\/CEL002_104.jpg?v=1793862437"},{"product_id":"ho-249-air-navigation-volume-1-selected-stars-epoch-2025","title":"Sight Reduction Tables for Air Navigation Volume 1 Selected Stars - Epoch 2025 - HO-249 - Book","description":"\u003cp\u003eThese 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 \u0026amp; 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.\u003c\/p\u003e\u003cp\u003eBecause of the high price and spotty availability of the Government editions, we have 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\u003c\/p\u003e\u003cdiv class=\"pc-book-specs\"\u003e\n\u003ch4\u003eBook Details\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 8.5 x 11 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Paperback\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePublisher\/Distributor:\u003c\/strong\u003e Celestaire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePublished:\u003c\/strong\u003e 2021\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Celestaire","offers":[{"title":"Volume 1 Selected Stars – Epoch 2025","offer_id":67856923459829,"sku":"CEL018","price":29.95,"currency_code":"USD","in_stock":true},{"title":"Volume 2 Latitudes 0-40","offer_id":67856923492597,"sku":"CEL008","price":29.95,"currency_code":"USD","in_stock":true},{"title":"Volume 3 Latitudes 39-89","offer_id":67856923525365,"sku":"CEL009","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/2198\/0149\/files\/CEL018_104.jpg?v=1793862449"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/2198\/0149\/collections\/sight-reduction-tables-banner.jpg?v=1793152521","url":"https:\/\/paracay.com\/collections\/sight-reduction-tables.oembed","provider":"Paradise Cay Publications, Inc.","version":"1.0","type":"link"}