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3 gen 1924 anni - Development of new revolutionary navigation system

Descrizione:

The first radio acoustic ranging navigation operation on the west coast is conducted by the coast and geodetic survey. This event is significant because it is the first navigation system that is capable of operation in all weather conditions.

Aggiunto al nastro di tempo:

marnie

ByBarr Levi
6 feb 2018

Data:

3 gen 1924 anni
Adesso
~ 100 years ago
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