1. UTM Mapping • Universal Transverse Mercator (UTM) is a type of map projection where location can be given with varying numerical accuracy • UTM maps are divided using the metric system. This system is ideal for ground operations on foot, since distances walked (meters) can easily be measured and plotted on the map. • No two grids will have the same number.

2. Sample Map Grid • Reading gridded maps: Read Right, then Up • The lines of a gridded map form small squares 1000m on each side called grid squares • The East-West number represents the first half of the grid coordinate, and the North-South number is the other half. • The least accurate grid reference is four digits: it represents the bottom left corner of a 1000m x 1000m square ReadRight, Then Up: The East-West coordinate of the yellow box is 05 The North-South coordinate is 12 The yellow box’s grid location is 05 12

3. For Better Accuracy: • Each 1000m x 1000m grid square can be divided into 100m smaller squares with an accuracy of 100m. • One number is added to each half of the grid coordinate • Always remember to begin your reading from the southwest (bottom left) corner of the grid 1 2 3 6-Digit Accuracy: Add one number to each half of the grid coordinate to get an accuracy of 100m Point 1: 054 126 Point 2: 057 122 Point 3: 050 120

4. 8-Digit Accuracy • On most maps, an 8-digit coordinate will be the most accurate point you can get. • 8-digit coordinates provide an accuracy of 10m. To get an 8-digit coordinate, use a gridder or a mental estimate to add one more digit to each half of your six digit coordinate, remembering to measure right, then up.

5. Sample Iron Man ES Course Coordinates Point 1: 8042 5544 Point 2: 8000 5535 Point 3: 7993 5627 Point 4: 7895 5594 Point 5: 7947 5562 Point 6: 7942 5487 Point 7: 7990 5458 Point 8: 7963 5436 Point 9: 7890 5463 Point 10: 7834 5470 Point 11: 7779 5511 Solutions Point 1: __A6___ Point 2:___H5___ Point 3:__K3___ (ELT Bearing 195) Point 4:___L1___ (ELT Bearing 223) Point 5:__M7__ Point 6:___A9___ Point 7:___H4___ (ELT Bearing 340) Point 8:__C6___ Point 9:___D2__ (ELT Bearing 073) Point 10:__A9___ Point 11:___B3__ Estimated ELT Location: ___7974 5511________ 3 4 5 1 2 11 6 10 9 7 8