The Marathon Military Navigator Pilots was first developed in 1986. It was made as a request by Kelley Air Force Base for a watch which could be used in situations a pilot or parachutist would encounter. Marathon fulfilled this request with the Navigator Pilots Quartz. Made from a special fibershell case that is water resistant to 6 ATM, sweat and shock resistant, as well as lightweight. Included with the Military Navigator Pilots Quartz is a 20 millimeter width nylon strap made under MIL-S-46383B, Type III. The watch uses an acrylic crystal resistant to rapid changes in pressure that would cause a watch’s crystal to shatter.