Here is a tool designed to help out with four of the more time-consuming tasks associated with military land navigation. The app is free to download from the iOS App Store, supporting GPS location and Distance-Azimuth calculations. If you like what you see, then use In-App Purchase to enable the other three modules Grid4Target, Intersection and Resection.
Unlike most other navigation tools for the iPhone, MGRS Tools is designed to be fully functional without a data connection. This makes the application more useful to our service members when operating in remote training areas or deployed overseas in combat operations.
Read more about MGRS Tools at the following URL:
http://militarypro.com/apps/MGRS-Tools