Postage stamps: industry and technology - Germany / Federal Republic of Germany 1976 - 20 Pfennig

A new postage stamp continuous series with illustrations from industry and technology replaces the postage stamp continuous series »Federal President Heinemann« with a total of 14 values. The illustrated lighthouse "Alte Weser" - built in the years 1961 to 1964 - is located in the estuary of the Weser, about 30 km off the coast. It serves the navigation as a driving fire and designated with its numerous guidance and warning sectors the various access channels to the ports on the Weser. In addition to its task as the most important beacon of the outer Weser, he also has significance as a carrier of an unmanned radar station. In addition, a fog system is installed on it. The construction of this lighthouse did not succeed at the first attempt. In a storm on 28. 7.1961 the not yet concreted tower shaft was destroyed, so that the work was interrupted and had to be tackled again the following year. Construction and construction of the tower were due to the unprotected position of the construction site in the open sea area. Because of the wave, current and ice load, the tower shaft was designed very slim in the water level area with 6.50 m in diameter, while the operating rooms are housed with the extensive beacon and radar systems in the far projecting upper floors. The beacon equipped with a xenon lamp has a range of 28 nautical miles (51.8 km). The tower stands in an average of 11 m deep water and is inserted with his foot still 11 m into the sea-bottom. The total height of the structure from the sole to the radar antenna is almost 61 m. For the power supply, a 6,000-volt cable was laid from the mainland. In the event of a power failure, two emergency generators automatically take over power supply within 4 seconds. The lighthouse was initially occupied with 4 men. Since 1972, he has been remotely controlled and remotely monitored from Bremerhaven.