U TM units are displayed on the borders of each topo map. E. These examples represent 4,108,000 meters north of the equator and 23,000 meters east of the 500,000 meridian in eastings. Now look at the borders of the topo map between the map corners. The northing and easting numbers are abbreviated at 1000-meter intervals along blue ticks on older maps or at the black grid lines on newer maps. Also, it is a great way to confirm a location to a cave - if all three location methods agree, then you've probably used all three methods correctly.
Practice helps, too.
Like tiding a bicycle, once you learn how, you won't forget. It's not only a great way to locate caves, it also works in plotting your deer stand, your secret morel mushroom location or some other geologic wonder.