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![Carl Aslakson monitoring EPI receiver on HYDROGRAPHER theb2299.jpg Carl Aslakson monitoring EPI receiver on HYDROGRAPHER](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2299.jpg?itok=Nm6LKqsT)
Description
Carl Aslakson monitoring EPI receiver on HYDROGRAPHER.Field testing of EPI - first medium frequency survey navigation system.Invented within the Coast and Geodetic Survey (Image credit: Family of Captain George L. Anderson, C&GS;)
Credit
Family of Captain George L. Anderson, C&GS;
Display Date
August, 1948
Location
Gulf of Mexico
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Navigation
High & Medium Frequency Navigation Systems
Keywords
Charting
Navigation
Electronic
HF and MF Systems