Restricted Areas


Please insert the security code.

Last modified: 24 Apr 2022, submitted by: Joker

Country: United States    Region: Wisconsin

Latitude: 46° 0' 0" N     Longitude: 90° 0' 0" E

Area use / Military Branches: Closed


46 5'3"N 9054'55"W Former Clam Lake Extremely Low Frequency (ELF) transmitting station.
The ELF transmitter site was composed of 2 ground dipole antennas, each 14 miles long, extending in 4 directions from the central transmitter site.
This station transmitted signals at 76 Hz to communicate with submerged US nuclear submarines worldwide.
Clam Lake site was operational between 1985 - 2004 and has been replaced by newer systems.
The antennas have been removed.

Search for 9. NAV / Clam Lake

Your Message

Name *
(Plain Text Only)

Security Code*

Please insert the security code.

* Required Fields

Top         Home