Marathon Navigator (NAV) watches were originally developed in partnership with Kelly Air Force Base in 1986. The NAV Series consists of timepieces engineered to stand up to the rigours of high-altitude flight and even possible ejection from a fighter aircraft. . Built to meet military specifications, this watch delivers exceptional accuracy, durability, and readability in all conditions. Ideal for pilots, military personnel, and outdoor adventurers. Watchaser official retailer.