USN ELF Communications System

Michigan - Republic ELF transmitter site - photos, photo

Wisconsin - Clam Lake ELF transmitter site - info

1987 Popular Science Magazine article on ELF system and other sub comms

1988 Popular Communications Magazine article and photos

Briefing - "ELF Communication Concepts and Capabilities" - 6 MB pdf

Briefing - "ELF Communications System" - 4 MB pdf

Briefing - "ELF Communications System" - 3 MB pdf

Info sheet - "Information about ELF Communications" - 0.4 MB pdf


Early ELF tests - 

There were two feasibility tests in the 1960's. Many thanks to Don Utt for info, pointers, and corrections.

Clam Lake WI - Naval Electronic Engineering Office

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NC ELF experiment
ELF-1963-01.jpg (123251 bytes)
Proposed balloon VLF/ELF
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VLF-ship-1964.jpg (273338 bytes)