Skydiving is an extreme sport for adrenaline junkies and part of the job description for Airborne military units. Whether you are throwing yourself out of a plane as a soldier or civilian the JM Calculator offers everything you will need to prepare for a HALO or HAHO jump. Use the JM calculator to check your calculations, plot your HARP, locate a DZ, find your altimeter and CYPRESS settings and autofill your HALO/HAHO computation sheet. This app is easy to use with its wind import feature that imports all relevant wind data for given Lat/Long or MGRS coordinates with the touch of a button. Jumpers will be alerted of any dogleg, incompatible, or erroneous winds as well as given a map with a plotted DIP and HARP. Once your data is collected you can then print or email a PDF version of the military computation sheet before a jump.