Before revision: The AN/FRD-10 Circularly Disposed Antenna Array (CDAA) is a United States Navy circular "Wullenweber" antenna array , 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 Circularly Disposed Antenna Array (CDAA) 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.