Breitling Navitimer B01 Chronograph 46 AB0137211C1P1 Automatic Men's Watch 46mmProduct Highlights Breitling's Iconic Pilot's Chronograph Its Journey. In 1952, Willy Breitling developed a wrist worn chronograph with a rotating slide rule that allowed pilots to perform all the calculations necessary for flight. Two years later, the design was unveiled as the official timepiece of the Aircraft Owners and Pilots Association (AOPA). Thus was born the "Navigation Timer," or "Navitimer." AOPA was (and still is) the world's largest