Map And Compass
Transcript: Need help remembering? Hidden Valley Ranch Salad Dressing Magnetic North: The direction to the north magnetic pole, as indicated by the north-seeking needle of a magnetic instrument. ie: a compass Grid North: The north that is established by using the vertical grid lines on the map. Using a Compass. When orienting a map with a compass, remember that the compass measures magnetic azimuths. Since the magnetic arrow points to magnetic north, pay special attention to the declination diagram. There are two techniques used. (1) First Technique. Determine the direction of the declination and its value from the declination diagram. (a) With the map in a horizontal position, take the straightedge on the left side of the compass and place it alongside the north-south grid line with the cover of the compass pointing toward the top of the map. This procedure places the fixed black index line of the compass parallel to north-south grid lines of the map. (b) Keeping the compass aligned as directed above, rotate the map and compass together until the magnetic arrow is below the fixed black index line on the compass. At this time, the map is close to being oriented. (c) Rotate the map and compass in the direction of the declination diagram. (d) If the magnetic north arrow on the map is to the left of the grid north, check the compass reading to see if it equals the G-M angle given in the declination diagram. Second Technique. Determine the direction of the declination and its value from the declination diagram. (a) Using any north-south grid line on the map as a base, draw a magnetic azimuth equal to the G-M angle given in the declination diagram with the protractor. (b) If the declination is easterly (right), the drawn line is equal to the value of the G-M angle. Then align the straightedge, which is on the left side of the compass, alongside the drawn line on the map. Rotate the map and compass until the magnetic arrow of the compass is below the fixed black index line. (c) If the declination is westerly (left), the drawn line will equal 360 degrees minus the value of the G-M angle. Then align the straightedge, which is on the left side of the compass, alongside the drawn line on the map. Rotate the map and compass until the magnetic arrow of the compass is below the fixed black index line. Requirements Shadow Stick Method Map And Compass For Example Watch Method Terrain Features Minor Second Class Rank Requirements: Demonstrate how a compass works and how to orient a map. Explain what map symbols mean. Using a compass and map together, take a five-mile hike (or 10 miles by bike) approved by your adult leader and your parent or guardian. First Class Rank Requirements: Demonstrate how to find directions during the day and at night without using a compass. Using a map and compass, complete an orienteering course that covers at least one mile and requires measuring the height and/or width of designated items (tree, tower, canyon, ditch, etc.). Hill Valley Ridge Saddle Depression The Two Norths Major Lensatic or Simple Draw Spur Cliff Cut Fill What if I Don't Have A compass? Compasses Orientation of your Map North Star
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