Larry Reinhart from San Gorgonio SAR recently shared a UTM reader that is useful for the popular Tom Harrison 1:4750 maps. As with the other readers, I recommend printing on overhead transparency media then laminating them.
As mentioned at the last IESARC meeting, please send any forms or other tools that you find helpful in your SAR efforts. I post them in the "Documents" section of the website.
Larry has updated the file to contain readers for most of the popular map scales in this series of maps. The file now contains readers for the San Jacinto, Angeles, Baldy, and Whitney regions in addition to the San Gorgonio region.