Category Archives: HF4 News

Mojo and IKM Secure EU MARTEC II grant for development of a Hi Flo ROV

Mojo Maritime, leading British tidal energy marine operations specialists, and IKM Subsea, Norwegian ROV manufacturer and operator, have jointly secured a significant EU Horizon 2020 Grant to support a €1,200,000 R&D project to develop an ROV for use in high energy tidal sites, and capable of being operated from Mojo’s ground breaking tidal energy vessel, the Hi Flo 4 (HF4).

A significant proportion of overall tidal energy costs are in array installation and, between 2012 and 2014, Mojo Maritime designed and developed the HF4, an offshore construction vessel (OCV) capable of lifting the heaviest envisaged tidal turbines and of dynamically positioning in up to 5.0 ms-1 (10 knots) of tidal stream. These operational advantages will feed through into installation benefits, and Mojo’s early analysis using Mermaid™ shows that in medium energy tidal sites HF4 can install tidal arrays in half the time and at a third of the cost of conventional methods. HF4 thus offers the possibility of levilised costs of energy for tidal arrays of £118 per MWH, already below that of many envisaged offshore wind projects, and Mojo is now working with its ship-owning partner, Hammonia Reedeira, to select a yard to build the first-of-class HF4, with an anticipated delivery date target of late 2016.

A next step in reducing tidal energy levilised costs is improving the performance of key installation tools, such as ROVs, which are used not only for turbine and foundation installation, but also for cable touch-down monitoring. Conventional ROVs are generally designed to operate in subsurface currents of up to 1.5 ms-1 but, in Mojo’s experience, many struggle above 1.0 ms-1. Conventional ROVs are thus a key operating limitation in the design (and cost) of the marine operations for tidal energy installations, where subsurface current speeds of 5.0 ms-1, are the norm in high energy tidal sites.

For this reason, Mojo and IKM joined forces in mid-2014 to bid for EU funding, from the Maritime Technologies (MARTEC II) call, to develop a HF ROV capable of being operated from the HF4 in high energy tidal sites. Mojo’s extensive tidal technology installation background complements IKM’s ROV manufacture and operations experience including the design, build and operation of modern WROVs, such as IKM’s pictured Merlin WR200, intended to be the most efficient and reliable work class ROV on the market.
The two companies target is to develop a basic design for an HF ROV that is capable of then being manufactured according to a schedule that will align with the envisaged build schedule for the HF4 ship.

With its genesis in the tidal energy sector, the HF4 vessel is highly optimized and offers cost effective performance in wide range of applications, including offshore wind and oil&gas. It is therefore anticipated that the HF ROV will operate from both HF4 and OCV’s in a range of offshore operations and conditions. The companies were awarded the funding at the end of 2014, granted as part of the EU’s Marine Technology II Horizon 2020 programme, and administered by InnovateUK in the United Kingdom, and work began in earnest on the project on 5 January 2015 on the HF ROV, and will continue through to the end of 2015.

Horizon 2020 is the EU Research and Innovation funding programme and is a major opportunity for British business to grow internationally, build networks and develop new relationships with potential customers. The programme has an available budget of €79bn (up to 2020) and the emphasis is on science, industrial leadership and tackling societal challenges. The UK’s innovation agency, Innovate UK, is responsible for providing support and increasing UK business participation in Horizon 2020. It is a key priority for Innovate UK to help businesses access the funding and benefits provided through participation in EU programmes, including offering expert advice provided by a group of knowledgeable individuals as part of a National Contact Points (NCPs) scheme.

Mojo Secures Best Tidal Industry Collaboration Award at ITES 2014

Mojo Maritime has won the Best Tidal Industry Collaboration Award at the 8th International Tidal Energy Summit, on 25 November, for its leadership of the Hi Flo 4 (HF4) tidal energy vessel consortium, comprised of Voith, Bauer Renewables, DNV GL and University of Exeter.

Underpinned by the Technology Strategy Board (now InnovateUK), the HF4 project set out to deliver a bespoke offshore construction vessel (OCV), designed to make significant reductions in tidal energy installation costs. Beginning in December 2012, the £2.8M R&D project encompassed a number of inter-related work streams, including, amongst other things, naval architecture, dynamic positioning, and role equipment integration, supported by environmental analyses and crew concept development. The project was successfully concluded in September 2014, with the key output being a ship design for a tidal installation, operations and maintenance vessel that meets all of DNV GL’s preliminary ship classification society requirements. The HF4 design also meets or exceeds all of Mojo’s design objectives, not least through its ability to dynamically position in up to 10 knots of tidal stream and lift up to 250 tonnes with the removable A-Frame offshore crane. Although sized and equipped for the tidal sector, the vessel lends itself perfectly for operations in offshore wind and oil & gas. The design fills a gap between construction vessels/ sophisticated anchor handlers designed for the offshore market, and the smaller service vessels (such as multicats) that have developed to meet the needs of the marine civils industry.

Early modelling using Mojo’s Marine Economic Risk Modelling AID (Mermaid) software is demonstrating HF4’s game changing potential for the tidal sector. For example, in a high-energy tidal site such as the Pentland Firth or Raz Blanchard, and using the Bauer drilling spread and monopile foundation, early Mermaid analysis is showing that 3 x HF4 vessels will be able to install a 375 MW commercial array of 250 turbines rated at 1.5MW in just over 2 years. Mermaid shows that this is less than a third of the time of 3 x conventional OCVs, thus in addition to the installation cost savings, the HF4 technology also offers significant early yield benefits, by bringing 375MW of capacity on-line 4 years early. These advantages show up in levelised cost of energy (LCOE) figures and Mojo believe that, by combining HF4 and the Bauer monopile technology, it will be possible to deliver tidal LCOEs of around £116/MWH, a figure that is below that of Round 2 and 3 offshore wind, and close to that of nuclear.

After accepting the award at ITES Richard Parkinson, Mojo’s Managing Director, said: “It is not often that you get the opportunity to make a game-changing contribution to a new energy sector, but that is exactly what I believe we have done with HF4. Although we are still using Mermaid, our operational planning software, to refine our LCOE figures, we are increasingly confident that LCOEs for tidal energy below £120/MWH are in prospect, once we get the ship into service.”

Mojo is now working hand-in-glove with its commercial partner and major vessel owner, Hammonia Reederei, to select a yard and commence first-of-class building with a view to bringing HF4 into service in mid-2016.

Mojo Maritime’s HF4 exceeds expectations with stunning simulated DP Performance

Mojo Maritime’s HF4 has demonstrated stunning DP (Dynamic Positioning) performance and manoeuvring characteristics based on results of simulations recently undertaken. Mojo Maritime has concluded the design of the advanced DP system in collaboration with GE and Voith Turbo and it has been tested in DP simulations and ship-handling simulators respectively. These systems provide an accurate model of vessel DP and handling capability. The target was to develop a vessel with the ability to hold station to a tight footprint in currents of up to 10 knots- this dramatically exceeds the capabilities of any vessels currently on the market, thereby providing major risk and cost reductions across a range of industries and operations.

The simulation tools used to design the DP system for the HF4 were based on collecting and analysing turbulence data from the Inner Sound, Pentland Firth. The current speeds and directions at this site fluctuate dramatically, making them very difficult for existing DP systems to cope with due to the changing variables, thereby confusing the DP software.

An extensive list of scenarios has been simulated based on a wide range of real-life operational and worst case situations. These scenarios have included failure of a thruster during operation, which is the worst single-point failure expected when operating in harsh environments.

The final results of the simulations were very impressive- the vessel demonstrated excellent station keeping at 10 knots even with the effects of the turbulence. The big test was the effect of single point thruster and systems failures- the results were astonishing:

Quote from Toby Bates, DP Training and Development, Mojo Maritime:

“The vessel was able to maintain station even in very extreme environmental conditions- 10 knots of current combined with 50 knot winds and 3m waves. We then failed the thrusters and systems and amazingly the vessel lost a small amount of position yet recovered within seconds.”

This extraordinary DP performance has the potential to deliver techno-economic advantages to a range of applications in the renewable energy sector- notably:

  • Tidal energy – where the vessel will have the capability to operate through neap and spring tides in even the most aggressive sites such as The Pentland Firth and Raz Blanchard. This has a major impact on operability and ultimately installation costs and production. Additionally, the vessel can provide rapid response on O&M interventions without having to wait for neap tides.
  • Offshore Wind- where the vessel can demonstrate better control and safety during cable laying and trenching operations. The DP system has been developed to provide excellent stability and a unique deck layout for better cable control and handling in harsh environmental conditions with a low risk of excursion.
  • Offshore Wind Operations and Maintenance – where the vessel’s unique bespoke Rapid DP system, which demonstrated capability during simulation of undertaking crew transfers every 4-6 minutes (compared to 35 minutes for existing vessels). This means the vessel can undertake 10 crew transfers an hour compared to 2 for a conventional vessel, leading to much higher uptime on technician’s hours.

Quote Richard Parkinson, Managing Director of Mojo:

“I am delighted with the performance of the vessel. It has exceeded our expectations during the simulations, with excellent stability and response in DP and manual operations. She is extremely rapid in acceleration, deceleration and turning and very stable in all conditions. Compared to a conventional vessel she is able to operate with current and wind from any direction, which makes set up on site much quicker and much more flexible. We are planning for the first vessel to be delivered in June 2016”

Toby Bates will be presenting the vessel at the upcoming SMM Conference in Hamburg where the vessel will feature on the Voith Simulator on stand 414, Hall A4, 9-12th September 2014.

Toby and the HF4 simulator will also be at the WindEnergy Hamburg conference, Hall B3, stand 218, 23-26th September 2014.

For further information please contact Richard Parkinson on 01326 218218

Mojo-DP Performance

Mojo Maritime reaches a major milestone in building the HF4 offshore construction vessel

Mojo Maritime has signed, on 16 January, a Memorandum of Understanding with Hammonia Reederei GmbH & Co. KG, a major German ship owner and manager, to finance and build the Hi Flo 4, the first ship in a completely new class of offshore construction vessels. As a result, Mojo and Hammonia, along with other Technology Strategy Board project partners, are now working together to appoint a shipyard and secure the first charter for this innovative and exciting new ship. Designed to operate in extreme tidal races, the Hi Flo 4 has extraordinary operational potential across a wide range of offshore construction roles.

In particular, the vessel has the potential to revolutionise the tidal energy sector. Specifically, it is designed to massively reduce the weather delays and risks in operating in tide races, and as a consequence has the potential to reduce current installation costs by up to 80%. In addition, it has been designed to allow rapid operations and maintenance intervention, independent of the state of the tide, therefore dramatically increasing project yields and dramatically reducing operations and maintenance costs. It also has the potential to provide highly competitive capability and performance in a wide range of other offshore construction roles, including offshore wind, cable laying and trenching, and sub-sea oil & gas interventions.

As part of the agreement with Hammonia, Mojo will be providing specialist offshore engineering and operations expertise, to complement Hammonia’s successful track record in ship management and project development. Hammonia, as part of the Döhle Group, will rely on Peter Döhle Schiffahrts-KG’s excellent competencies in chartering, crew management and insurance services.

Richard Parkinson, Managing Director of Mojo: “We are delighted to be working with Hammonia Reederei. They share our vision for the Hi Flo 4 vessel, and the two companies have highly complementary skill sets. Hammonia’s commitment to Hi Flo 4 demonstrates not only their confidence in the vessel, but also in the team that has brought the ship to this advanced design stage. It is a great day for Mojo.”

Rene Menzel, Managing Director of Hammonia: “We are very pleased indeed to be working with Mojo Maritime. From the first time we became aware of the Hi Flo 4, and its unique capabilities, we could see it had the potential to transform the offshore construction market. We are thus excited about the prospect of broadening our portfolio, and with such a highly capable ship. And we are also very pleased to be working with Mojo, given their unusual experience in marine renewable energy and offshore engineering and operations.”

For further information please contact Steven Jermy or Bart Vroon on 01326 218218

The Technology Strategy Board is the UK’s innovation agency. Its goal is to accelerate economic growth by stimulating and supporting business-led innovation. Sponsored by the Department for Business, Innovation and Skills (BIS), the Technology Strategy Board brings together business, research and the public sector, supporting and accelerating the development of innovative products and services to meet market needs, tackle major societal challenges and help build the future economy. For more information please visit

Mojo Maritime Updates on HF4

Following the announcement in March 2013 that Mojo Maritime Ltd. was working on the development of their patented High Flow Installation Vessel (HF4), extensive progress has been made. The substantial amount of time and resources invested by Mojo Maritime Ltd. and their partners has ensured that the project remains on schedule. The basic design is expected to finish in early November and plan approval is now underway.

In parallel with the vessel’s technical development, Mojo Maritime Ltd. are engaging with stakeholders in the marine renewable energy market in order to drive commercialisation of the vessel. Although the HF4 is primarily designed for more efficient and safer marine operations in high tidal flows, the solid capabilities of the vessel have led to increasing interest from other marine renewable energy sectors, including offshore wind. The overall performance of the vessel is directly comparable to an Offshore Construction Vessel (OCV), but at a considerably lower capital cost.

Richard Parkinson, Mojo’s Managing Director, commented “The vessel’s size, performance and manoeuvrability make it an excellent tool for a whole range of offshore tasks including inter-array cable installation, trenching and remedial works in offshore wind farms.”

The vessel has a twin hull configuration powered by 4 Voith Schneider Propellers (VSP). Substantial optimisation has been carried with respect to the hydrodynamics of the twin hulls coupled with the VSP’s, thereby leading to excellent performance. With an overall length of 60 metres, a beam of 28 metres and the incredible amount of power, it is already being referred to as a “Pocket OCV”.

The vessel is being commercially developed to be available in summer 2015 with shipyard tendering and construction planned to commence in the 1st quarter of 2014. Mojo Maritime Ltd. has gathered a highly capable collaboration team consisting of Bauer Renewables (subsea drilling), Voith Turbo Marine Engineering (leading on basic design and supply of VSP’s), DNV (classification) and the University of Exeter (analysis of turbulence and input to DP simulation). The project is also receiving support from the Technology Strategy Board, the UK’s innovation agency, through its Marine Energy – Supporting Array Technologies (MESAT) Programme.

The Technology Strategy Board is the UK’s innovation agency. Its goal is to accelerate economic growth by stimulating and supporting business-led innovation. Sponsored by the Department for Business, Innovation and Skills (BIS), the Technology Strategy Board brings together business, research and the public sector, supporting and accelerating the development of innovative products and services to meet market needs, tackle major societal challenges and help build the future economy. For more information please visit

Mojo Maritime Launches HiFlo-4 to Unlock Tidal Energy

Mojo Maritime revealed plans for its patented development of the HiFlo-4 Installation Vessel (HF4) at the Renewable UK 2013 Wave and Tidal Event in London. HiFlo-4 is a high performance vessel built around installation processes and the demanding environment experienced in tidal races such as The Pentland Firth. The launch focused on the vessel’s capability, the economic model and the commercial development of the project and is focused on safe, economic industrialisation of tidal energy.

The vessel is designed to operate using dynamic positioning in currents up to 10knots, allowing a high degree of accessibility and improved productivity during the construction phases of tidal energy farms- indeed the modelling carried out demonstrates that the vessel is capable of complete installation and hook up of 50 turbines per year equating to 70MW of installed capacity from a single vessel.

The vessel is a twin hull vessel powered by 4 Voith Schneider Propellers (VSP), with a high degree of attention on the hydrodynamics of the twin hulls coupled with the VSP’s. The vessel is capable of installing foundations, cables, subsea connectors and turbines in a wide range of conditions. The design has been inspired by Mojo’s work with Bauer on their award winning BSD-3000 Subsea Drill and provides a safe and economic platform for installing drilled foundations.