Efficiency at sea – Four decades of experience and innovation

Owner, Johannes Østensjø established Østensjø Rederi in 1974. His passion for innovation and vessel design, along with his dedication to move forward, has provided the company with an amazing history. In collaboration with long standing partners and exceptional employees, the company has been at the forefront of the maritime industry for over 40 years.


1973Signed the first deal for construction of four supply vessels with a shipyard in South Africa.
1974Østensjø Rederi was officially established in Haugesund, Norway.
1975Signed the first tug deal. It was not successful, but it formed the basis of the company’s future success in the towing segment.
1976First major platform supply deal is signed with energy giant British Petroleum (BP) at the Forties field near Dundee.
1978First major platform supply deal is signed with energy giant British Petroleum (BP) at the Forties field near Dundee.
1982First in the world to install dynamic positioning (DP) on a PSV (Edda Fjord). Industry standard today.

Signed a contract with the giant new Kårstø gas terminal near Haugesund. The contract lasted until 2015.
1986The oil price fell below $10. Energy firms began reviewing their contracts and we survived by reluctantly selling off vessels.
1987BREAKING POINT: With the company facing uncertain future, we signed two extensive deals on the same day! The clients were Statoil and Norsk Hydro.
1993Esso Fawley refinery in the UK signed a ten-year tug contract. Østensjø Rederi opened its first English office in Southampton.
1996Together with 40 shipping companies, we took part in establishing a maritime apprentice office for the west coast of Norway - Maritimt Opplæringskontor Sør/Vest Norge.
1997Østensjø Rederi opened its office in Ireland in Cobh Cork Harbour.
2000The Ajax escort tug is commissioned. It is the largest and most powerful tug of its kind in the world at the time of delivery.
2003Edda Fonn delivered as the first purpose built ROV-/survey/light construction vessel in our fleet.
2006Took part in establishing well intervention company Deepwell.
2011Established the Accommodation segment with Edda Fides being the first vessel of its kind in the world
2014Awarded two long-term tug contracts with Statoil on Melkøya and Sture terminal. The contract included seven new buildings.
2015Entered the renewable offshore wind segment with the commissioning of a service operation vessel on contract for DONG Energy.
2016Became the first shipping company in the world to get 9001:2015 accreditation from DNV.

The advanced Offshore Construction Vessel (OSV) Edda Freya is delivered. She is the largest investment in the history of the company. The Siemens BlueDrive plus C system is installed in combination with a large battery package, providing the vessel with a very good environmental footprint.
2017Takes delivery of three dual fueled tugs. First dual fueled escort tugs built in Europe. The tugs commenced long term contract for Statoil Hammerfest LNG.
2018Takes delivery of two unique purpose-built SOV's, Edda Passat and Edda Mistral from Astilleros Gondán in Spain. The SOV's commenced contract with Ørsted.