Loran 1940 to 1946

The rapid development of Loran – long range navigation - under wartime conditions at MIT’s Radiation Lab was not only a significant engineering feat, but also transformed navigation, providing the world’s first near-real-time positioning information. Beginning in June 1942, the United States Coast Guard helped develop, field and operate Loran into the 21st century.

Questions: why 1940 to 1946 if the USCG was involved for over 67 years

Jcoopersmith12:49, 25 October 2011