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OS Energy prepares for first hybrid methanol support vessel
A series of survey vessels are being built in Denmark with an energy storage system and methanol and diesel gensets, with the first ready for sea trial for delivery in July 2026
OS Energy UK is preparing to take delivery of the first of a series of Denmark-built hybrid methanol-ready offshore tug, support vessels for various operations, including towage and surveys.
Fortuna Bluebird has been constructed in Esbjerg Shipyard and is ready for sea trials before its anticipated delivery in July.
This 43-m vessel has Kongsberg Maritime DP2-class dynamic positioning, 400 kWh energy storage, one methanol generator set and two diesel gensets, from Scania and Danfoss, for fuel flexibility.
OS Energy Marine Power Solutions naval architect Joseph Hodgson said this offshore survey and support vessel would be starting sea trials imminently and should be delivered in mid-July ready to go on charter in August.
“Fortuna Bluebird is part of a series of four vessels with the second expected in February 2027 as part of a conveyor belt of diesel-methanol hybrid vessels,” Mr Hodgson told Riviera at the Seawork exhibition in Southampton, UK.
It would be used for various offshore support and survey work, including inspecting monopiles in offshore windfarms in the North Sea.
“It includes methanol tanks and fuel handling system and a genset, plus batteries for peak shaving and additional loads for its accommodation, deck machinery and A frame, so there is no need for another genset,” said Mr Hodgson. “There is a lot of technology on a compact vessel.”
Lehmann Marine sales manager Matthias Eindorf said it had supplied a 400 kWh Cube battery system and Baumuller was the system integrator.
This vessel has two Schottel azimuth thrusters, each rated up to 750 kW, two other 300-kW thrusters and a disk-type waterjet of 300 kW for propulsion, DP2 and station keeping.
It also has accommodation for eight crew members, storage for 80 m3 of methanol and 100 m3 of marine diesel and 150 m2 of deck space and tankage for 60 m3 of fresh water.
Its deck machinery includes two electric wire windlasses, an Iron Fist, an 82-ton active-heave-compensated marine crane, an 8-ton A frame, a hinged side-mounted survey pole and a launch and recovery system for a remotely operated vehicle in a 10 m2 moonpool.
A third of these hybrid methanol support vessels is expected to be delivered in Q3 2027, said Mr Hodgson.
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