Before revision: The AN/FRD-10 is a United States Navy circularly disposed antenna array (CDAA), built at a number of locations during the cold war for high frequency radio direction finding (HF/DF) and signals intelligence.
After revision: The AN/FRD-10 is a United States Navy circularly disposed antenna array (CDAA), built at a number of locations during the Cold War for high frequency radio direction finding (HF/DF) and signals intelligence.