With the announced targets for offshore wind at the Esbjerg summit, the North Sea is to become the powerhouse of the EU. It is predestined for large-scale hydrogen production. Considering the growing offshore hydrogen projects and initiatives in the region, cross-border cooperation between neighbouring states is essential. Therefore, the development of a transnational concept for offshore hydrogen production and transport is urgently needed. MOHN (Masterplan Offshore Hydrogen North Sea) is taking up this challenge. The project aims to develop a strategy to accelerate the implementation of offshore electrolysis capacity in the North Sea.