I recently taught a map and compass class and as has happened many times before a large portion of the class was deeply perplexed by the UTM grid system. In the end all the participants finally grasped the concept but a lot of valuable class time was consumed by this section of the training. My question is who is using the UTM system to find their location on a map? I completely understand that the UTM system is used as the primary projection for incident mapping by the GIS community but usually a Lat/Lon grid is displayed on the maps produced on incident maps. Is it still worth the time to include this section in the training with such a focus on digital mapping and hand held devices usually configured to display Lat/Lon?