Norwegian offshore wind installation player Fred Olsen Windcarrier has signed a long-term agreement with Siemens Gamesa Renewable Energy for operation and maintenance services.

The work will be carried out utilising either the Bold Tern or Brave Tern self-elevating, self-propelled jackup offshore wind turbine installation vessels. The vessels will be working on Siemens Gamesa turbines up to and including 15MW turbines.

Operations under the agreement are expected to commence in the first quarter of 2028, with a firm duration of 10 years and optional extension periods.

According to the company, the agreement otherwise reflects negotiated market terms and conditions.