NSS Annapolis, officially known as Naval Communications Station Washington, D.C. Transmitter or NavCommStaWashingtonDC(T), was a Very Low Frequency (VLF) and High Frequency (HF) transmitter station operated by the United States Navy. Rendered obsolete by satellite technology and the end of the cold war, NSS ceased operation and most of all of the antennas and most of the towers were demolished in 1999. Only three of the smaller towers were preserved for historic reasons.