The only inhabited place where the Alte Weser or Roter Sand Lighthouse can be seen with the naked eye is the German island of Wangerooge.

On low visibility conditions a foghorn sounds a signal, the Morse code letters "AL", with an interval of one minute.

Directional antennae and a radar serve as means of security in the Weser approach while an anemometer and an automated tide gauge collect data on wind conditions and water levels.

2), its downward tapering tower shaft together with its cantilevered upper storeys, was based on a design by engineer Andreas Carstens, Bremerhaven.

The German Waterway Administration, the Wasser- und Schifffahrtsamt (WSA) Bremerhaven as the responsible governmental agency, assigned the task of workmanship to a cooperative of companies: Philipp Holzmann, Strabag Bau AG, Hermann Moeller.

The steelworks for the tower shaft, the upper storeys and the equipment were carried out in a dry dock of the Howaldts factory in Kiel (fig.

The tower shaft was towed through the Kiel Canal towards its destination site in the Outer-Weser waterway (fig.

Frequently, adequate supply of building materials was hampered and delayed, because relatively small coasters had been contracted for transport, which were quite sensitive to the state of the sea and weather conditions.

To this end, all building materials needed for the underwater concrete had to arrive on time and without delay.

The storm surge of 1962 which cost many human lives in Hamburg and other places on the German coast had no impact on the construction of the lighthouse.

In the third year, after the lift platform had been repaired, the construction works resumed at the tower shaft and were subsequently completed.

Under favourable weather conditions the upper storeys were placed on top of the tower without complications (fig.

The foundation of the building was safeguarded with stone ballast poured down on bush mats against rinsing and water erosion.

As an additional improvement of the waterway conditions as implemented by the procedure as a whole (see above), construction of another lighthouse was essential.

The tower shaft, as well as the upper storeys of the Tegeler Plate Lighthouse, were intended to be entirely built as steel construction.

Alte Weser Lighthouse, as well as Tegeler Plate, Roter Sand and others, were shown on various paintings by Katharina Noack.