{"product_id":"9780939837588","title":"Emergency Navigation Card","description":"A wealth of information is provided: an emergency almanac for the sun, and declination tables for the stars; several methods of sight reduction, including one that requires only the card itself; and angular markings on the perimeter of the card that allows approximate altitude measurements of celestial bodies. With this card and a watch you can find your way to any major port in the world. Other information includes how to steer by the stars and finding your boat's speed. A handy card to have in case your GPS, sextant, or almanac becomes lost. The card is loose-leaf sized. You can punch holes in it for insertion in a binder. It is plastic laminated for weatherproofing and durability.","brand":"Paradise Cay Publications","offers":[{"title":"Default Title","offer_id":47033894666480,"sku":"9780939837588","price":12.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9780939837588_p0.jpg?v=1763871030","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780939837588","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}