The question is how many other animals might use similar night-time navigation.

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Pictured at left above, Easton started working at the Naval Research Laboratory in 1943, and later helped develop MINITRACK, the very first satellite tracking system, which in turn led to the concept Easton dubbed TIMATION (short for "time navigation").

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The crew were flying their twin-engined aircraft on a night-time cross country navigation exercise out of RAF Kinloss in Moray on 13 April.

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