APPENDIX B SOME COMMON CONVERSIONS
 Some Common Conversions Much of the polar literature makes use of the metric system to express values. Below are some rule-of-thumb conversions to more familiar U.S. values: Distances One meter = 39 inches (3 ft., 3 in. or 3¼ ft.) To convert meters to feet, multiply meters by 3.25 Ex.: 500 meters = 500 X 3.25 = 1625 feet. One degree of latitude ( º ) = 60 nautical miles. (There are 60 minutes [ ' ] of latitude in one degree; one minute of latitude = one nautical mile). One nautical mile (nm.) = 1.15 statute miles (sm.). To convert nautical miles to statute miles, multiply nautical miles by 1.15. Ex.: 60 nm. = 60 X 1.15 = 69 sm. Note: one knot (kt.) designates one nautical mile per hour in speed. To convert knots to miles per hour, multiply knots by 1.15. One kilometer (km.) = 0.62 statute miles To convert kilometers to statute miles, multiply kilometers by .62 Ex.: 100 km. = 100 X .62 = 62 sm. Temperatures To convert centigrade (Celsius) to Fahrenheit, multiply centigrade by 1.8 and add 32. Ex.: 15ºC = 15 X 1.8 = 27 + 32 = 59ºF 0ºC =   0 X 1.8 =   0 + 32 = 32ºF [0ºC and 32ºF are the freezing points of water; water boils at 100ºC and 212ºF]. Note that at very low temperatures such as might be encountered in the polar regions, centigrade and Fahrenheit values are closer together. --30ºC = --22ºF --40ºC is the same as --40ºF --50ºC = --58ºF
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