The VLF transmitter DHO38 is a VLF transmitter used by the German Navy

German Navy

The German Navy is the navy of Germany and is part of the unified Bundeswehr .The German Navy traces its roots back to the Imperial Fleet of the revolutionary era of 1848 – 52 and more directly to the Prussian Navy, which later evolved into the Northern German Federal Navy...

 near Rhauderfehn

Rhauderfehn

Rhauderfehn is a municipality in the Leer district, in Lower Saxony, Germany....

, Saterland

Saterland

Saterland is a municipality in the district of Cloppenburg, in Lower Saxony, Germany. It is situated between the cities of Leer, Cloppenburg, and Oldenburg...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. It is used to transmit coded orders to submarine

Submarine

A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

s of the German Navy

German Navy

The German Navy is the navy of Germany and is part of the unified Bundeswehr .The German Navy traces its roots back to the Imperial Fleet of the revolutionary era of 1848 – 52 and more directly to the Prussian Navy, which later evolved into the Northern German Federal Navy...

 and navies of other NATO countries.

DHO38 has transmitted since 1982 on 23.4 kHz

Hertz

The hertz is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of the sine wave, particularly those used in radio and audio applications....

 with a power of up to 800 kilowatts

Watt

The watt is a derived unit of power in the International System of Units , named after the Scottish engineer James Watt . The unit, defined as one joule per second, measures the rate of energy conversion.-Definition:...

. DHO38 uses an umbrella aerial

Antenna (radio)

An antenna is an electrical device which converts electric currents into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver...

, which is carried from 8 steel tube masts with a height of 352.8 metres. Each pylon stands on 3 metre tall ceramic

Ceramic

A ceramic is an inorganic, nonmetallic solid prepared by the action of heat and subsequent cooling. Ceramic materials may have a crystalline or partly crystalline structure, or may be amorphous...

 cylinders, which serve as insulator

Electrical insulation

thumb|250px|[[Coaxial Cable]] with dielectric insulator supporting a central coreThis article refers to electrical insulation. For insulation of heat, see Thermal insulation...

s for voltages up to 300 kV

Volt

The volt is the SI derived unit for electric potential, electric potential difference, and electromotive force. The volt is named in honor of the Italian physicist Alessandro Volta , who invented the voltaic pile, possibly the first chemical battery.- Definition :A single volt is defined as the...

. The masts are equipped with cylindrical oscillation

Oscillation

Oscillation is the repetitive variation, typically in time, of some measure about a central value or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but sometimes...

 dampers for better protection against storms. The transmitter is capable of transmitting signals to submarines worldwide to depths of approx. 30 metres.

External links

• http://skyscraperpage.com/diagrams/?b45289
• Satellite picture at Google Maps