{"product_id":"suunto-a-40-northern-hemisphere-compass","title":"Suunto A-40 Northern Hemisphere Compass","description":"\u003cp\u003e\u003cstrong\u003eUser Friendly Recreational Compasses\u003c\/strong\u003e \u003c\/p\u003e\r\n\u003cp\u003eThe A-range of recreational compasses is a series of handy, well designed, navigational aids which are assets in any environment. All four models in the series (A-10, A-20, A-30 and A-40) are compact, high-accuracy instruments made from durable, clear, scratch resistant acrylic that have been ergonomically designed to fit into the palm of your hand for optimum ease of use. These light-weight compasses feature a fixed declination correction scale as well as a patent-pending lanyard snap-lock enabling the compass to be easily detached from the lanyard. \u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eField compasses in general\u003c\/strong\u003e \u003c\/p\u003e\r\n\u003cp\u003eMechanical compasses have been working as the navigator since several thousands of years. \u003c\/p\u003e\r\n\u003cp\u003eStill today magnetic compass is environmentally friendly, cheap and the most reliable tool when choosing the course. The oldest Suunto field compasses, which are still in use, are manufactured in 1938. A high quality field compass hardly needs any other service than washing in fresh water from time to time. The compass works without any external power supply. The compass gets its power from nature – from the magnetic north pole.\u003cbr\u003e  \u003cbr\u003e\u003cstrong\u003eCOMPASS BALANCING  \u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cstrong\u003eTwo Geographical Balancing Zones\u003c\/strong\u003e \u003c\/p\u003e\r\n\u003cp\u003eThe vertical intensity and direction of the earth's magnetic field, the inclination, influences the horizontal plane of a compass needle according to the latitude where it is used. Due to inclination, compasses must be balanced for different geographical zones in order to keep the needle in a horizontal position. \u003c\/p\u003e\r\n\u003cp\u003ePreviously, the globe was divided into five different balance zones in which specific compasses functioned. However, as people travel more and more, the need for a compass with a greater geographical range has increased. Thanks to Suunto's 'Two Zone System' there are only two balance zones to consider in compass use - the northern hemisphere and the southern hemisphere. In practice, this means that a Suunto compass designed for the northern hemisphere will still work for a fair distance into the southern hemisphere, and vice-versa. \u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eBalanced for northern and\/or southern hemisphere\u003c\/li\u003e\r\n\u003cli\u003eFixed declination correction scale\u003c\/li\u003e\r\n\u003cli\u003eDetachable snap-lock in lanyard. Easy to detach for working with the map\u003c\/li\u003e\r\n\u003cli\u003eJewel bearing\u003c\/li\u003e\r\n\u003cli\u003eIntegrated curvimeter (map measurer), conversion scales\u003c\/li\u003e\r\n\u003cli\u003eBaseplate with magnifying lens\u003c\/li\u003e\r\n\u003cli\u003eLuminous bezel and markings help to use the compass in dark conditions\u003c\/li\u003e\r\n\u003cli\u003eControl marking holes \u003c\/li\u003e\r\n\r\n\u003cli\u003ecm or inch scales\u003c\/li\u003e\r\n\u003cli\u003eSize: 57 x 120 mm \/ 2.2\" x 4.2\" \u003c\/li\u003e\r\n\u003cli\u003eWeight: 38 g \/ 1.3 oz\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Suunto","offers":[{"title":"Default Title","offer_id":53081514967360,"sku":"suuntoa40","price":32.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/8953\/7088\/files\/suuntoa40_LRG.png?v=1787966644","url":"https:\/\/goinglights.com\/products\/suunto-a-40-northern-hemisphere-compass","provider":"Going Lights","version":"1.0","type":"link"}