Translations:Adventist Youth Honors Answer Book/Recreation/Wilderness Living/23/en

Width Estimation, Method 1

The first method we present here for estimating the width of a stream will involve choosing an easily seen marker on the opposite side, and designating is "Marker A". Place a second marker (B) directly across the stream from marker A, and the place two more markers (C & D) along the stream bank at equal intervals. That is, be sure that the distance from B to C equals the distance from C to D. Also, try to form a 90° angle from A to B to C. Walk away from the stream at 90° from line B-D until you can see that markers A and C line up. Mark the place where this happens with marker E. If your 90° angles are accurate and the distance from B-C and C-D are equal, the distance between E-D will equal the distance between A-B (which is the width of the stream).