The inventive U.S. Navy officer taught the most famous pilots how to navigate in the air using a precise Longines watch,
a sextant and the stars.
Amy Johnson (left) is trained by navigation expert Philip Van Horn Weems. Over her sleeve, the British aviatrix is wearing a Longines pilot’s watch with an inner rotating disc that synchronises the watch to the radio signal. On the desk there is another Longines pilot’s watch. (Annapolis, Maryland, USA,
3rd May 1937).