Incat Crowther and AFAI Southern Shipyard, Guangzhou, China, have delivered a pair of Incat Crowther 35 CTVs.
The 112'11"x36'2"x13'8" MHO Asgard and MHO Apollo are the first hybrid CTVs in operation with extensive zero-emission capability. The vessels will service the Hornsea Project 2 offshore wind farm off the Yorkshire coast in the North Sea for Ørsted. The aluminum vessels are the third and fourth Incat Crowther-designed vessels for MHO-Co A/S, Esbjerg, Denmark, following the deliveries of MHO Esbjerg and MHO Gurli.
MHO Asgard and MHO Apollo have 13'8" drafts and are powered by an advanced propulsion system that was developed in collaboration with Danfoss and Volvo Penta. The system is comprised of a pair of diesel drivetrains and a pair of diesel-electric drivetrains, each driving Volvo Penta IPS drives. The main diesel engines are Volvo Penta D13s, producing 515 kW each and giving the boats a running speed of 25 knots.
The generators used for the diesel-electric propulsion train are Volvo Penta D8-MH units. Three additional units are located in the hulls amidship, alongside a Volvo Penta D5 used as a harbor generator. Propulsion is via Volvo IPS units. Additionally, a Corvus battery system provides stored power for zero-emission operation.
The system offers flexibility, allowing the vessel to operate in zero-emission electric mode for up to eight hours, or in combination with diesel propulsion for a maximum speed of 25 knots. The flexibility is enhanced by the use of multiple modular generators, meaning power generation can be optimized for the operational profile.
Incat Crowther worked with MHO to develop a design that improved on its predecessors, offering more space and functionality. The flexible layout features a 110m2 foredeck with multiple tie-downs, deck crane, moon pool and the capability to take Bring-to-Work (BTW) systems. The Z-Bridge BTW system has been trialled on MHO Esbjerg.
MHO Asgard and MHO Apollo accommodate 24 technicians in mid-deck cabins. A comfortable saloon for technicians is located on the main deck with 24 suspended seats, lockers, a pantry and a separate mess. Additional technician rest spaces are also located on this deck, as is a large wet room with lockers and showers.
“Designing and building hybrid CTVs is a huge step in the environmental direction, and I am proud that we ... have found partners who share our vision for sustainable development in the offshore industry,” MHO-Co CEO and founder, Mik Henriksen, said in a statement announcing the deliveries.
“MHO Asgard and MHO Apollo demonstrate Incat Crowther's growing reputation for collaboration with operators and developers of new propulsion technologies, delivering fully-integrated solutions based on proven platforms,” Ed Dudson, managing director of Incat Crowther Europe, said.
Tankage includes 17,858 gals. of fuel and 925 gals. fresh water. The new CTVs carry crews of eight.