In order to supply the East Frisian Islands, Niedersachsen Ports ensures the maintenance of the necessary port structures in Norddeich, Bensersiel, Norderney, Baltrum, Langeoog, Spiekeroog and Wangerooge.

Niedersachsen's coastal and island ports with island supply functions are of great economic importance. They secure the existence of the island inhabitants and make tourism possible on the islands.