Orion – Press Release

Orion – Press Release

Fishing Vessel ‘Orion, BF 432’ – Press Release

Macduff Ship Design are pleased to announce the delivery of the new build fishing vessel, ‘ORION, BF 432’, to owner Brian Harvey and his two sons Andrew and Simon. This new build replaces their previous fishing vessel of the same name, which was built by Macduff Shipyard in the early nineties and is intended to fish around the coast of Scotland, predominately in the North Sea.

ORION was originally planned to be built from the yard’s previous 24.50 m hull model but during the early design phase, a decision was taken to remodel the vessel’s bow based on the preliminary results from a tank testing program which Macduff Shipyard and Macduff Ship Design were running for another project. A quick study was conducted by the Wolfson Unit in Southampton using CFD technology to compare the proposed new bow against the previous model with the results showing a net decrease in hull resistance at steaming speeds, as anticipated. Following this, the hull form was faired and finalised by Macduff Ship Design who then produced a full set of steel construction plans along with conducting the incline experiment and producing the vessels stability booklet. The fabrication of the hull of ORION was subcontracted to Kedat Shipyard based in Szczecin, Poland with the construction reviewed and verified by Bureau Veritas to comply with the MCA’s construction standard and upon completion, the hull was towed to Macduff for outfitting by the yard

The hull of ORION is built completely from steel, apart from the wheelhouse and mast, and features a double chine hull form, transom stern and modern bow designed to cut cleanly through the sea with less energy leading to a reduction in fuel consumption and emissions along with increased crew comfort. In broad terms, the layout of the ORION is largely like some of the other recent new builds produced by the yard. Below deck features the cabins, engine room, fish hold and a large freshwater tank forward of the collision bulkhead. Whereas above deck is situated the aft shelter, galley/mess and side passage area, fish processing area and then a winch room forward where the trawl winch is situated.

A bespoke hydraulic deck machinery package was fabricated by the yard for the ORION comprising of a triple barrel winch powered by dual motors, two split net drums, two bagging winches, two small gear handling winches, cod-end lifting winch and a dedicated anchor windlass. Thistle Marine of Peterhead supplied both the MFB8 landing crane and MBK13 power block crane, both of which featuring a slew ring base. Primary hydraulic power is provided by a single Parker hydraulic pump driven from a dedicated Mitsubishi 6D24 auxiliary engine producing 218 kW whilst secondary hydraulic power is provided by the combination of one electric/hydraulic motor set with an output of 22 kW in tandem with a Parker hydraulic pump driven from a power take-off fitted to the main propulsion’s gearbox. A hydraulically powered bow thruster is also fitted with 180 hp. The hydraulic system, designed by the yard, is cooled via a Blokland box cooler and Bowman heat exchanger.

The propulsion package features a 2.5 m fixed pitch propeller supplied by Wartsila, driven by a CATERPILLAR C32 main engine with 660 hp @ 1600-1800 rpm through a Masson Marine W7400 reversible gearbox with 9.077:1 reduction. ORION is the seventh vessel built by the yard in recent years to feature this propulsion package which has demonstrated itself to be both robust and adaptable with the Wide Operating Speed Range of the C32 main engine providing flexibility to achieve full power from a fixed pitch propeller both whilst steaming and trawling. The efficiency gains predicted during the early design phase were realised during engine trials with the vessel achieving 9.1 knots at only 50% engine load and 10.5 knots at 100% load. ORION also features a triple rudder system and a high lift propeller nozzle provided by Wartsila.

Cooling systems for all engines and hydraulics onboard are served by box coolers supplied by Blokland Non-Ferro.

Electrical power onboard is provided by two Mitsubishi generator sets supplied by Macduff Diesels Limited, each with a rating of 98 ekW and sufficiently sized to run the vessel’s power independently providing complete redundancy.

The electrical systems onboard were designed and fitted by R.D. Downie who also fabricated the vessels switchboard and control panels for all the pumps and motor starters. In addition to this R.D. Downie also provided the fire, bilge and gas alarm systems on board along with the navigation light panel and assisted with the installation of the navigation equipment.

The fish processing deck features a catch handling system built by the yard and is complemented by a DEGA resin floor system fitted by PBP services. Two separate compartments are formed within the fish processing area which house both a dry locker and ice plant room. The fish hold refrigeration system along with the ice machine was supplied and fitted by Premier Refrigeration.

The high specification navigation package was supplied and fitted onboard by McMinn Marine Ltd, please contact David McMinn for full details.

Fishing gear was supplied by Faithlie Trawl (International) Ltd, Seaforth Trawls Ltd and Caley Fisheries.



Length overall: 24.50 m
Length Registered: 22.95 m
Beam: 7.60 m
Depth: 4.30 m
Depart port displacement: 350 t
Freshwater capacity: 20,612 li
Oil fuel capacity: 26,320 li
Hold capacity: 700 boxes
Speed: 10.5 knots
Crew: 6-8
Caterpillar C32 main engine supplied by Finning Power Systems, UK
Propeller and nozzle supplied by Wartsila, Spain
Gearbox supplied by Masson Marine, France
Hull design and stability information supplied by Macduff Ship Design
Generator sets supplied by Macduff Diesels Ltd, UK
Box cooling systems for each engine and the hydraulic circuit supplied by Blokland Non
Ferro, Netherlands
Pumps supplied by Azcue Pumps SA, Spain
Deck machinery equipment supplied by the yard
Deck cranes supplied by Thistle Marine, UK
Bow thruster supplied by the yard
Fire doors supplied by B-15 Marine Ltd, UK
Weathertight doors supplied by Winel, Netherlands
Rudder system supplied by the yard

Steering gear supplied by Scan Steering APS, Denmark
Wheelhouse windows and portlights supplied by HK Van Wingerden & An BV,
Fish handling system supplied by Macduff Shipyard
Refrigeration system and ice machine supplied by Premier Refrigeration Ltd, UK
Paint system by International Paints, UK
Wheelhouse chairs supplied by Norsap, UK
Oil fuel filter/separator and main engine oil fine filter supplied by CC Jensen, UK
Pressure washers supplied by Grampian Power Clean, UK
Anchors and chain supplied by Fendercare Marine, UK
Switchboard and electrical system supplied and installed by R D Downie Limited, UK
For details of the fishing gear contract the owner
For details of the electronic equipment package contact the owner


Kallista Helen – Press Release

Kallista Helen – Press Release

Marine Vessel ‘Kallista Helen’ – Press Release


Macduff Ship Design are pleased to announce the delivery of the Aquaculture, Thermolicing Vessel MV ‘KALLISTA HELEN’. The first of its type to be designed and built-in Scotland. The vessel, completed by Fergusons Marine Engineering, is the fifth to enter service for Inverlussa that has been built to plans from Macduff Ship Design, compounding a long working relationship culminating in the most innovative design delivered to Inverlussa yet.

The project began in the summer of 2018 when the owner expressed an interest to build a new state of the art de-licing vessel with fish health and welfare front of mind. Scottish Sea Farms, who the vessel will be on contract with, were looking to minimise fish handling and maximise fish welfare and it was these key requirements that the vessel was built around.  Events outside of everyone’s control have caused delays to the project however she has now been delivered to the owners and is completing final outfitting and commissioning of the Thermolicer equipment in Shetland.

Central to the vessels principles is a Thermolicer designed and engineered by ScaleAQ and the first of its kind to be constructed in Scotland. A sudden rise in water temperature is a well-known method of killing lice so the Thermolicer has been developed to bathe the fish in temperate water for a short period. This will cause the lice to die and fall off the fish, after which they are separated from the water using a 500 – micron filtration system and collected to be removed from the marine environment. Wider pipes with an overall straighter and simpler layout have been utilised to create a gentler experience for the fish. This method allows for de-licing up to 120 tonnes per hour of fish.  The system allows for high levels of fish welfare and, as the process only utilise seawater, at the same time avoids pumping any chemicals into the sea. The system is at the heart of fish welfare which is what the boat has been built around. To protect this asset, it has been enclosed in a dedicated shelter deck to shield it from the elements. In turn, this provides a safer working environment for the crew as well as better operational efficiency and improved seaworthiness. Additionally, it provides a large area on the top deck for cargo and equipment, namely 3 H.S. Marine AK 40 cranes. The 40 ton/m cranes have a max outreach of 15.1m and can all work simultaneously without any restrictions. This capability allows the vessel to operate the entire system including all intakes and return systems and the vessel will be less dependent on other workboats while on site. Incorporation of cargo space and container latching points in the top deck allows for the haulage of ISO tanks should it be required.

The systems and machinery onboard have a high peak electrical load, resulting in a large engine room that spans over half the length of the hull.  Propulsion is derived from 2 x Cat C32 main engines delivering a total power of 1300hp, the engines are paired with two ZF W1800 reverse reduction gearboxes.  The shafts are connected to twin fixed pitched 1500mm propellors which are combined with low drag nozzles, supplied by Kort propulsion, to improve free running speed whilst maintaining a bollard pull of 15 tonnes.  The vessel is also fitted with high lift rudders by Wills Ridley and a 250 Kw hydraulic bow thruster by Kort Propulsion which ensures the excellent manoeuvrability required when working in and around the salmon farm. Two Cat C32 generators are also installed, providing 860kW each. These generators are used to power the thermolicing equipment, including the heating elements used to warm and maintain the temperature in the 22,000 Litres of seawater contained in the fish treatment system. They also provide power for the fish pumps and a 130 m3/h pump which is used to fill the system. The pumps used to bring the fish on board to begin the treatment are large vacuum pumps as these are relatively gentle on the fish and offer high fish welfare. To properly delouse the fish the system’s water is required to be at 28⁰C to 34⁰C depending on seawater temperatures however, there is a heat recovery system in place to draw heat from the engines and transfer it to the delousing system, saving on both fuel usage and carbon emissions. Smaller Cat C4.4 auxiliary engines are also used to power ships systems when the main generators are not in use.

With the ability to carry over 56m3 of fuel and over 40m3 of freshwater, the vessel has the ability to stay at sea for an extended period.

Forward of the engine room below deck sits 4 cabins with bathroom facilities. Careful consideration was made in respect to the accommodation area to ensure maximum crew comfort and insulation from engine room noise and vibration. Each cabin is equipped with heating, flatscreen T.V.’s, working desk, washbasin with mirror light and shaving socket as well as usual amenities to be expected. Above these cabins, on the main deck, a well-appointed galley/mess/lounge sits alongside the large dry locker. The dry locker incorporates engine room access, a shower room, access below to the cabins and access up towards the wheelhouse. Accommodation on the fo’c’sle deck is comprised of two single man cabins with a bathroom, an A/C and electronics space as well as a dedicated control room for the thermolicing equipment. Moving up to the large wheelhouse which gives a commanding 360-degree view with particular emphasis over the aft deck area thanks to the floor to ceiling windows. From here, aft control positions have been arranged port and starboard to allow for greater flexibility. There is also additional crew seating, a ships office area and a client office workspace within the wheelhouse.

We are thrilled to have been part of this project which showcases Scottish maritime strength with local businesses supporting each other, from initial design and conception through to the final deployment. Following completion of the vessel in Glasgow in May the ‘Kallista Helen’ departed for Shetland for final outfitting with a short stop at her homeport of Tobermory. Following the installation of the thermolicing equipment, she will go on a long term charter to Scottish Sea Farms.


Owner:                 Inverlussa Marine Services

Builder:                Ferguson Marine Engineering Glasgow

Designer:             Macduff Ship Design Ltd, UK


Length overall:  26.50 metres

Length registered: 23.95 metres

Beam:   12.00 metres

Depth:  3.50 metres

Maximum operational draft 2.75 metres

Maximum operational displacement: 558 tonnes

Freshwater capacity: ≈ 40 m3

Water ballast: ≈ 96 m3

Oil fuel capacity: ≈ 56 m3

Transfer Pumps: 32 m3/hr

Lube oil: 3,300 litres

Speed: 12.50 knots

Bollard pull 15.0 Tonnes

Crew: 10 person certified


ScaleAQ in Norway in partnership with ScaleAQ UK.


Sister Ships Launched

Sister Ships Launched

The pair-seiner ‘Crystal River’ FR 178 was transported to the slipway at low tide using specialist low loader units. With the low loaders removed, 6 hours and a large spring tide later, she was towed to her fitting-out berth to complete the final works. At the same time, the sister ship ‘Faithful’ FR 129 left Macduff for final trials before heading to Fraserburgh for preparations to go on her maiden trip. We are proud to have provided Naval Architecture services to Macduff Shipyard for these designs and wish the skippers good fishing and safe seas. 


Wide Range Of Vessels Surveyed In May

Wide Range Of Vessels Surveyed In May

The past few weeks has seen our staff carry out surveys on a wide range of vessels. 

The Shapinsay, an Orkney based ferry that has been dubbed Scotlands first hydrogen-powered ferry, was down from the Islands to Peterhead to undergo its 5-year survey. The vessel is fitted with 8 large cylindrical hydrogen tanks that will be used to power auxiliary systems on board.  The hydrogen tanks will be filled using the successful Surf ‘n’ Turf project which turns excess green energy into hydrogen. We carried out a successful lightship survey on the vessel which has made its way back to Orkney. 

We also attended an inclining experiment in Hull at the MMS yard to survey their new yacht which has been built for private ownership. The 55ft trawler yacht has been designed by us to have a layout that is beneficial for liveaboard yacht owners and a hull designed for long-distance cruising. We look forward to sharing interior photos once the outfitting has been completed. 

Finally, it was back to Peterhead to undertake another lightship experiment, this time on the 79m purser ‘F.V. Pathway’. Having only been delivered to her owners in 2017 this was her first 5-year interval survey. No issues or concerns arose from our survey and the vessel is now preparing to go back to sea. 


April Surveys

April Surveys

The good weather recently has been very welcomed by our staff who have been out of home-office for a series of surveys. An inclining experiment on the ‘Quantus’ was carried out over multiple days to ensure that the 65m fishing vessel continues to meet stability criteria. At the same time, we attended the Graemsay, an Orkney ferry, to undertake a lightship survey.


Kallista Helen

Kallista Helen

A new aquaculture vessel with a focus on fish welfare has been launched on Monday (15/3) by Ferguson Marine. The 26-metre boat is the latest addition to the Inverlussa Marine Services fleet and the 6th vessel launched that has been built to plans by Macduff Ship Design. This cements the long-lasting partnership between Macduff Ship Design and Inverlussa Marine Services as they continue to expand their fleet.

The £6M Kallista Helen is a multi-purpose service vessel that is to be fitted with a £2.5M next-generation Thermolicer. This will enable the salmon producer to intervene earlier with regards to sea lice control, helping safeguard farmed fish health.

Ben Wilson, Managing Director of Inverlussa, said the Kallista Helen, named after his niece, was built with fish health and welfare front of mind.

‘From the outset, Scottish Sea Farms was looking to minimise fish handling and maximise fish welfare, designing the boat around those. The result is so much better when you start with the fish then consider the boat, rather than the other way round.’

Central to the vessel’s bespoke design is the Thermolicer itself, designed and engineered by ScaleAQ in Norway in partnership with ScaleAQ UK.

The first of its kind to be constructed in Scotland, the system includes:

  • A simpler, straighter pipe layout creating a gentler experience for the fish
  • A wider than standard pipe of 600mm diameter to ensure a smoother journey through the system
  • Increased capacity of up to 120 tonnes per hour
  • 150-micron filtration to separate and collect the dislodged sea lice for removal from the marine environment.

In another first, the service vessel has been custom-built to house this delousing technology internally within a dedicated sheltered deck to protect it from the elements; the advantages being better operational efficiency, improved seaworthiness and safer working conditions for the crew.

It also frees up more space on the vessel’s top deck for equipment, including three cranes which means the vessel will be less dependent on other workboats during treatments.

Meanwhile, down in the engine room, there is a heat recovery system to draw heat from the engines and transfer it to the delousing system, saving on both fuel usage and carbon emissions.

Scottish Sea Farms Managing Director Jim Gallagher said: ‘Not only is the Kallista Helen another important step forward in our drive to ensure the best growing conditions for our fish, it’s also a great example of Scottish business supporting Scottish business from drawing board through to final deployment.

‘Events outside everyone’s control have caused delays but we’ve stuck together throughout, stayed focused on the end goal and now we’re back on course.’

The Kallista Helen is expected to arrive in Shetland in early May where it will be fitted out by Scale AQ’s Scottish team and Ocean Kinetics of Lerwick.

Once works are complete, the vessel will operate with two five-strong crews – one from Scottish Sea Farms, the other from Inverlussa – each working three week on/off shift patterns.