page_title: Very low frequency
hierarchical_section_title: Very low frequency
caption_attribution_description: Français&#160;: antenne parapluie VLF (Très Basse Fréquence 28,5 kHz) de la station Palmer est situé sur l'île d'Anvers, près de l'extrémité de la péninsule Antarctique, Base antarctique Palmer à 64°46′27″S 64°03′11″O.English: A VLF receiving antenna at Palmer Station, Antarctica, operated by Stanford University
context_page_description: Very low frequency or VLF is the ITU designation for radio frequencies in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively. The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters. Due to its limited bandwidth, audio transmission is highly impractical in this band, and therefore only low data rate coded signals are used. The VLF band is used for a few radio navigation services, government time radio stations and for secure military communication. Since VLF waves can penetrate at least 40 meters into saltwater, they are used for military communication with submarines.
context_section_description: Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively.  The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters (an obsolete metric unit equal to 10 kilometers).  Due to its limited bandwidth, audio (voice) transmission is highly impractical in this band, and therefore only low data rate coded signals are used.  The VLF band is used for a few radio navigation services, government time radio stations (broadcasting time signals to set radio clocks) and for secure military communication.  Since VLF waves can penetrate at least 40 meters (120 ft) into saltwater, they are used for military communication with submarines.
caption: A VLF receiving antenna at Palmer Station, Antarctica, operated by Stanford University.
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