Pyle PSKIW25BK PSKIW25GN Manual 1 - Page 13

13.4 Compass Mode - Applications of the Compass 0 mountain A 270° point A mountain B 135° Check Current Position By Backward Bearing point E 0 (finish point) 3120 m 315° 225° point C 0° point D 4110 m point B 315° 2120 m point A (starting point) A Sample Trail on a Map Check your position by Backward Bearing Directions ! Spot two distant identifiable landmarks like mountains, light-house, fort or building from your current position, for example the mountains A and B. ! Check out the backward bearing directions of mountains A and B from your current position, for example 135° from mountain A and 270° from mountain B. ! Use a ruler to draw a line 135° from the north at the mountain A to your current position on the map. Draw another line 270° from the north at the mountain B to your current position on the map. ! Yo ur current position on the map will be the intersection (point A) of the lines 135° from the mountain A and 270° from the mountain B. ! Check the Trek Course Correctly ! During a trekking, the Watch can keep your course in a correct way. For example, the correct trail starts from point A and finishes at point E as drawn on the adjacent map. ! Mark the points (identifiable landmarks) where the trail turns its direction or the trail branches its way, such as the points A, B, C, D and E on the adjacent map. ! Find out the bearing directions of point B from point A (315°), point C from point B (0°), point D from point C (225°), and then point E from point D (315°). ! During the trekking, make sure that the heading direction is 315° from point A to point B. Performing the similar checking in other sections of the trail helps you keep your course correctly. IMPORTANT: If you are in doubt of the directions and positions of the trail, consult the park administration office before starting the trekking. 13.5 Compass Mode - Magnetic Declination Magnetic North Magnetic Declination True North Magnetic Declination What is Magnetic Declination ! The Magnetic North Pole is slightly different from the True North Pole. ! The WeatherMaster, like most magnetic compass, points to the Magnetic North Pole. On the contrary, everything measured on a map is related to the True North Pole. ! The angular difference between Magnetic North Pole and True North Pole is called magnetic declination. Its magnitude (degrees and minutes) and direction (easterly and westerly) depend on where you are in the world. ! For a serious compass user who intends to perform an accurate navigation, the compass must be adjusted for magnetic declination. ! The Watch also includes a compensation setting for Magnetic Declination. Check the coming section "Calibrating the compass - Magnetic Declination Mode" for more details. Magnetic Declination Information ! Most topographic maps include a small arrow which shows the magnetic north pole and magnetic declination information. ! For the benefit of the user, this m a n u a l i n c l u d e s t h e magnetic declinations for some major cities. Check the coming section 'Magnetic Declination at Major Cities' for more details. ! For those cities, their names are not included on the list, please check the online magnetic declination information at: 1.http://www.geolab.nrcan.gc.ca/geomag/e_cgrf.html 2.Http://www.ngdc.noaa.gov/cgibin/seg/gmag/fldsnth1.pl 13.6 Compass Mode - Magnetic Declination Compensation magnetic magnetic declination north 23° W object B true north 0° true bearing 300° magnetic bearing 323° point A Tru e Bearin g (T B) = Magneti c Bearin g (M B) - Weste rly Magneti c Decli nati on (W ) 300° (T B) = 323° (M B) - 23° (W ) Compensate th e Bearin g with Weste rly (W ) Magnetic Declin atio n true north 0° magnetic declination 22° E magnetic north object B magnetic bearing 278° true bearing 300° point A Tru e Bearin g (T B) = Magneti c Bearin g (M B) + Easte rly Magneti c Decli nati on (E ) 300° (T B) = 278° (M B) + 22° (E ) Compensate th e Bearin g with Easte rly (E ) Magnetic Declin atio n Magnetic Declination Compensation ! To compensate for an object's bearing, either subtract westerly (W) magnetic declination or add easterly(E) magnetic declination with the magnetic bearing. ! Example 1: Westerly magnetic declination 23°and the compass needle points 323°. ! TB = MB - W. When MB = 323°; W =23° ! TB = 323° - 23° ! TB = 300° ! The true bearing is 300°. ! Example 2: Easterly magnetic declination 22° and the compass needle points 278°. ! TB = MB + E. When MB = 278°; E = 22° ! TB = 278°+ 22° ! TB = 300° ! The true bearing is 300°. ! The Watch allows you to compensate the compass bearing at a place where the magnetic declination is either Westerly declination or Easterly declination. ! Check the coming section "Calibrating the Compass" for more details of the setting. 13.7 Compass Mode - Magnetic Declination at Major Cities No. Country/Place 1 Afghanistan 2 Australia 3 Austria 4 Bahrain 5 Bangladesh 6 Belgium 7 Brazil 8 Canada 9 Chile 10 China 11 China 12 Costa Rica 13 Cuba 14 Czech Republic 15 Denmark 16 Egypt 17 Finland 18 France 19 Germany 20 Greece 21 Hungary 22 India 23 Indonesia 24 Israel 25 Italy 26 Japan 27 Jordan 28 Kenya 29 Korea 30 Malaysia 31 Mexico 32 Nepal Major City Declination Kabul Canberra Vienna Manama Dhaka Brussels Brasilia Ottawa Santiago Beijing Hong Kong San Jose Havana Prague Copenhagen Cairo Helsinki Paris Berlin Athens Budapest New Delhi Jakarta Jerusalem Rome Tokyo Amman Nairobi Seoul Kuala Lumpur Mexico City Kathmandu +3E +12E +3E +2E +0E +0E -21W -14W +3E -6W -2W -1W -4W +3E +3E +4E +8E -1W +3E +4E +4E +1E +1E +4E +2E -7W +4E +0E -8W +0E +6E +0E No. Country/Place 33 Netherlands 34 New Zealand 35 Norway 36 Pakistan 37 Philippines 38 Portugal 39 Russia 40 Singapore 41 South Africa 42 Spain 43 Sweden 44 Switzerland 45 Taiwan 46 Thailand 47 UAE 48 United Kingdom 49 United States 50 United States 51 United States 52 United States 53 United States 54 United States 55 United States 56 United States 57 United States 58 United States 59 United States 60 United States 61 United States 62 United States 63 United States 64 United States Major City Declination Amsterdam Wellington Oslo Islamabad Manila Lisbon Moscow Singapore Cape Town Madrid Stockholm Bern Tai-pei Bangkok Abu Dhabi London Washington, DC Juneau Phoenix Little Rock Sacramento Denver Atlanta Honolulu Boston Saint Paul Jackson Santa Fe Oklahoma City Salem Harrisburg Salt Lake City +0E +22E +2E +2E -1W -3W +10E +0E -24W -2W +5E +1E -4W -1W +2E -2W -11W +22E +11E +1E +14E +9E -4W +10E -15W +1E +0E +9E +5E +16E -11W +12E NOTE: Since magnetic declination will be changed as going with time, recommend to check the update data from following site: http://www.magnetic-declination.com/ & http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp