NSS Annapolis
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NSS Annapolis
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| Basic data | ||||
| Place: | Greenbury Point , Anne Arundel County | |||
| State: | Maryland | |||
| Country: | United States | |||
| Altitude : | 4 m | |||
| Coordinates: 38 ° 58 ′ 40 " N , 76 ° 27 ′ 7.2" W. | ||||
| Use: | Telecommunication system , military use | |||
| Owner : | United States Navy | |||
| Demolition : | 1999 | |||
| Data on the transmission system | ||||
| Number of towers / masts: | 10 | |||
| Height of the towers / masts : | 1 × 356.76 m , 9 × 243.84 m | |||
| Construction time: | 1918 | |||
| Operating time: | 1918-1999 | |||
| Waveband : | VLF transmitter | |||
| Send types: | Directional radio , radio navigation | |||
| Position map | ||||
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NSS Annapolis was a long wave transmitter near Annapolis in the US state of Maryland . It was used to transmit orders to submarines . NSS Annapolis used a shielded antenna as an antenna , which was braced to a braced 356.76 meter high central mast and to nine other towers from 243.84 meters high. Six of these towers were earthed guyed constructions, while three towers were free-standing steel frame constructions like the transmission towers in Junglinster .