lose to it and sight on another, further along the line of travel. In this manner you can walk comfortably in between checkpoints without constantly referring to the compass.
88 BASIC COMPASS NAVIGATIONAL TECHNIQUES 2. Thick Bush Navigation Leapfrogging If bushes and trees are close together, it is not possible to travel as in open bush. With a minimum of two people traveling together, person A goes out ahead as far as possible, but still visible to person B. B then sights on A with the compass and moves that person left or right so that they move on to the desired line of travel. B then walks to A and the cycle is repeated as long as thick bush obscures the path ahead. This method is also useful for night navigation or navigation during conditions of low visibility (ie. snow and fog)
89 The leapfrog navigation technique
90 BASIC COMPASS NAVIGATIONAL TECHNIQUES 3. Navigation Around Small Obstacles If an obstacle such as a small pond or bog is encountered, sight with the compass on an object on the opposite side which is close to your direction of travel. Walk around to that object and proceed as before.
91 Continue Bearing 50 degrees Obstacle Travel Bearing 50 degrees Navigating Around a Small Obstacle
92 BASIC COMPASS NAVIGATIONAL TECHNIQUES 4. Navigation Around Large Obstacles Offsetting When a large obstacle is encountered that can not be sighted across, it may be necessary to divert the traverse to avoid the obstacle. Walk at a right angle to the traverse direction far enough to avoid the obstacle, counting paces. Turn back to the traverse direction and walk past the obstacle. Turn a right angle in the opposite direction and walk back towards the original line of travel, counting the same number of paces as before. You should now be on the original traverse line and ready to proceed forward.
93 100 paces at 140 degrees Continue at 50 degrees Large Rock face 100 Paces At 50 degrees 100 Paces at 320 degrees 50 Degrees Using an offset to navigate around a large obstacle
94 Pacing DISTANCE MEASUREMENT IN THE FIELD When accurate measurement is necessary, as in grid searches or plotting trails, and no GPS is available, pacing is the most practical method available. Measuring distance accurately by pacing requires experience. Every person has a different pace length and the size of their step will vary depending on speed and the type of ground they are traveling on.
95 DISTANCE MEASUREMENT Pacing (cont.) IN THE FIELD To obtain pace information, measure out 100 meters and count the number of paces required to walk this distance. Repeat the route until the number of paces becomes consistent. Try this exercise in a variety of locations as pacing changes depending on the terrain.
96 DISTANCE MEASUREMENT String Boxes IN THE FIELD A string box is a plastic belt case containing a spool of thin string and a measuring device which registers as the string is let out. The user simply ties the string at the starting point and can then read the counter at any time to determine how far they have traveled. This method is more exact than pacing if a reasonably straight line can be maintained.
97 END OF CLASSROOM SESSION It s time to get outside and practice!!
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