{"id":53513,"date":"2026-01-11T21:08:16","date_gmt":"2026-01-11T20:08:16","guid":{"rendered":"https:\/\/kart.no\/produkt\/sight-reduction-tables-pub-249-air-navigation-volume-1\/"},"modified":"2026-01-11T21:08:16","modified_gmt":"2026-01-11T20:08:16","slug":"sight-reduction-tables-pub-249-air-navigation-volume-1","status":"publish","type":"product","link":"https:\/\/kart.no\/en\/produkt\/sight-reduction-tables-pub-249-air-navigation-volume-1\/","title":{"rendered":"Sight Reduction Tables &#8211; Pub. 249 (Air Navigation) &#8211; Volume 1"},"content":{"rendered":"<p data-start=\"805\" data-end=\"1113\">This volume is <strong data-start=\"821\" data-end=\"855\">Volume 1 in the Pub. No. 249 series<\/strong> and contains sight reduction tables for <strong data-start=\"899\" data-end=\"920\">selected stars<\/strong>, intended for use in astronavigation. The book is designed for air navigation, but is also widely used by sailors and navigators at sea practicing classical celestial navigation with a sextant. <\/p>\n<p data-start=\"1115\" data-end=\"1431\">Volume 1 differs from Volumes 2 and 3 in that it focuses specifically on <strong data-start=\"1188\" data-end=\"1212\">stellar observations<\/strong> and contains pre-calculated tables for a selection of navigational stars. The tables make it possible to quickly calculate the altitude and azimuth of stars, based on the observer&#8217;s assumed position and nautical almanac data. <\/p>\n<p data-start=\"1433\" data-end=\"1792\">This edition is labeled <strong data-start=\"1457\" data-end=\"1471\">Epoch 2020<\/strong> and is valid for several years (good through 2024), as star positions change slowly over time. Often used in conjunction with Volumes 2 and 3 for complete coverage of solar, planetary and stellar navigation, this book is a key tool for sailors seeking an electronics-independent method of positioning. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Astronavigation tables for selected stars (Pub. No. 249 Vol. 1), used for star navigation with a sextant.<\/p>\n","protected":false},"featured_media":42718,"comment_status":"open","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":""},"product_brand":[1395],"product_cat":[1073],"product_tag":[],"class_list":{"0":"post-53513","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-u-s-national-geospatial-intelligence-agency","7":"product_cat-celestial-navigation","8":"product_shipping_class-boxship","9":"pa_produsent-celestaire","11":"first","12":"instock","13":"taxable","14":"shipping-taxable","15":"purchasable","16":"product-type-simple"},"composite_virtual":false,"composite_layout":"","composite_add_to_cart_form_location":"","composite_editable_in_cart":false,"composite_sold_individually_context":"","composite_shop_price_calc":"","composite_components":[],"composite_scenarios":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Sight Reduction Tables - Selected Stars Volume 1 | Astronavigasjon<\/title>\n<meta name=\"description\" content=\"Sight reduction tables for selected stars (Pub. No. 249 Vol. 1), used for astronavigation with sextant and nautical almanac.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kart.no\/en\/produkt\/sight-reduction-tables-pub-249-air-navigation-volume-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sight Reduction Tables - Pub. 249 (Air Navigation) - Volume 1\" \/>\n<meta property=\"og:description\" content=\"Sight reduction tables for selected stars (Pub. No. 249 Vol. 1), used for astronavigation with sextant and nautical almanac.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kart.no\/en\/produkt\/sight-reduction-tables-pub-249-air-navigation-volume-1\/\" \/>\n<meta property=\"og:site_name\" content=\"Kart.no\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/kart.no\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kart.no\/wp-content\/uploads\/2026\/01\/Sextant-Sight-Reduction-Tables-for-Air-Navigation-Band-1-3.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"1201\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/sight-reduction-tables-pub-249-air-navigation-volume-1\\\/\",\"url\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/sight-reduction-tables-pub-249-air-navigation-volume-1\\\/\",\"name\":\"Sight Reduction Tables - Selected Stars Volume 1 | Astronavigasjon\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/sight-reduction-tables-pub-249-air-navigation-volume-1\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/sight-reduction-tables-pub-249-air-navigation-volume-1\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/kart.no\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Sextant-Sight-Reduction-Tables-for-Air-Navigation-Band-1-3.jpg\",\"datePublished\":\"2026-01-11T20:08:16+00:00\",\"description\":\"Sight reduction tables for selected stars (Pub. 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