Erecting EPI (Electronic Position Indicator) antenna.
EPI was a medium frequency system that was useable out to 200 miles.
Invented within the Coast and Geodetic Survey
Image ID: theb2297, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Nunivak Island, Bering Sea, Alaska
Photo Date: 1951
Credit: C&GS Season's Report Reed 1951-123
Category: Charting/Navigation/Electronic/HF and MF Systems/
• High Resolution Photo Available