Things are getting tighter in the Baltic Sea: Construction of the "Windanker" offshore wind farm off Rügen begins

In January, the Federal Maritime and Hydrographic Agency (BSH) approved the construction of the "Windanker" offshore wind farm 38 kilometres north-east of Rügen. Work is due to begin this summer. The BSH has now announced that illuminated cardinal buoys will be installed "in good time before the start of the construction phase" to mark the construction area. As soon as these buoys are in place, a further notice to mariners will be issued. Until then, boaters should take extra care when travelling through the area.

The cardinal barrels are deployed at these positions:

54°55.7554'N | 013°59.3526'E

54°55,7519'N | 014°01,7799'E

54°53,6326'N |014°04,4319'E

54°54,8616'N |013°58,5559'E

54°51,9809'N | 013°59,5767'E

Another 25 square kilometres of sea area occupied

The buoys mark an area of around 25 square kilometres in the open sea where the multinational Iberdrola Group will build a total of 21 wind turbines. According to the company's website, these turbines are due to be connected to the grid in the last quarter of 2026. This sea area is expected to be closed during the construction phase.

This means that the area between Rügen and Bornholm is becoming more crowded, as the new wind farm is being built directly north-east of the already active wind farms "Arkona Südost" and "Wikinger". Further west, two other offshore wind farms, "Baltic Eagle" and "Arkadis Ost", are under construction. In the German Baltic Sea, wind farms are generally regarded as restricted areas: Passage is prohibited and pleasure craft must keep a minimum distance of 500 metres.

All information on navigating wind farms in the North Sea and Baltic Sea can be found here.

Loopholes for pleasure craft

However, there are still small loopholes: the Wikinger and Arcona Südost parks, among others, are exempt from the transit ban under certain conditions. During the day, AIS-equipped ships up to 24 metres in length are permitted to pass directly through them. However, anchoring between or mooring at the facilities is prohibited. Visibility must be at least 1000 metres when passing through and the wind must not exceed 6 Beaufort. A distance of 150 metres must always be maintained from the individual wind turbines and 1000 metres from platforms with transformer stations or other technical equipment. If work is being carried out in the park or if there is air traffic, a minimum distance of 1000 metres also applies. Finally, the official nautical chart number 2660 must also be on board. As a general rule, up-to-date information should be obtained before every voyage.

Construction is also underway in Denmark

Further north-east on the route, the construction sites continue, because by 2030 off Bornholm two huge offshore wind farms are also being built. The turbines will be erected around ten nautical miles south-west of Bornholm. However, a 12 nautical mile wide and 20 nautical mile long corridor for shipping is planned between the two wind farm areas.

The dimensions of the planned wind turbines are impressive. With a rotor diameter of 236 metres, they will reach a height of 268 metres above sea level. By comparison, the piers of the Öresund Bridge, which connects Denmark and Sweden, are only 206 metres high. They should be able to supply 3 to 4.5 million households with electricity.