The red arrows point to the UTM marks on your USGS Topographic map. On 7 1/2 minute and 15 minute maps, the distance is 1,000 meters between ticks. The left arrow is the East-West axis: 3 86 000. On the upper right is the North-South axis: 40 41 000. The X is located at about E386500 and N4040200 (you needn't be more accurate than within 500 meters or so...).
have a GPS unit, you can change it from the usual Latitude/Longitude
coordinates to UTM using the setup menu.
For an even more detailed explanation, check out the USGS Fact Sheet on how to read UTM's.
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