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Find out the latest updates and more in depth information from our experts on Scillonian IV and Menawethan.

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Menawethan now resembles a complete ship, with all hull blocks fully integrated in the building dock. On 12th March 2025 the final hull block, unit 14, was erected with the hull in the dock. This is the upper part of the cargo lift trunking and will contain the hydraulic ram for the cargo lift and also the structure to support the side shell door.

The impressive unit 11, which includes the wheelhouse, passenger lounge and crew accommodation, and units 12 (the engine casing) and 13 (the forward bulwark) have all been integrated with the rest of the hull in the building dock.

With the steel construction of Menawethan’s hull and super structure largely complete, work is now ongoing with outfitting, including the installation of stairs, guardrails, mooring equipment, machinery foundations, floorplate supports, electrical preparations, cargo securing arrangements and system piping. Work is also ongoing with the installation of the tunnel thrusters and stern tubes.

Blasting and painting of tanks and void spaces is also now underway, and the propellers, shafts and inner stern tubes have arrived. Preparations for mounting the outer stern tubes is underway.

Machinery is increasingly arriving at the shipyard, including Menawethan’s main engines, generators and propeller shaft line.


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Factory acceptance tests (FATs) for both vessels have been progressing with the controllable pitch propellers and propeller shafts (x2) for Scillonian IV being fabricated and tested in Wuxi, China.

The Hull Vane for Scillonian IV has been fabricated and shipped from the Netherlands.

The steering gear for Menawethan has been built and tested in Penryn, Cornwall.

The propeller shafts (2) for Menawethan have been fabricated and shipped from Balino, Spain.

The electrical switchboards for Menawethan have been fabricated and tested in Concarneau, France.

The factory acceptance tests include testing of the machinery safety systems and performance of the equipment enabling any issues to be identified before the machinery is delivered to the shipyard.

Classification Society surveyors, Lloyd’s Register, attend the FATs for all the major machinery and auxiliary equipment, such as the main engines, generators, electrical switchboards, gearboxes, etc and issue certificates on completion of satisfactory tests, as part of the supply chain quality assurance process.

Piriou and ISSG attend the factory acceptance tests to verify the performance of the machinery and confirm that it functions correctly and in accordance with specification. Should there be any issues, these can be addressed and resolved prior to the machinery being delivered to the shipyard.


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We are proud to be working with two leading Cornish companies, Armada Engineering Ltd and Wills Ridley Ltd, to supply hydraulic and steering systems for our new vessels, Scillonian IV and Menawethan.

Armada Engineering Ltd and Wills Ridley Ltd both have long histories of working with the Steamship Group, providing maintenance support on the company’s current vessels for more than 30 years.

Falmouth-based Armada is a world leader in marine hydraulics and engineering, with an office and workshop in Barcelona to service the superyacht industry.

The company has an unrivalled reputation creating state-of-the-art hydraulic systems and engineering solutions for marine vessels of all kinds, and works in markets including renewable energy, oil and gas, mining and construction.

The hydraulic power units for Scillonian IV and Menawethan will be designed, built and tested at Armada’s workshop in Falmouth before being shipped to Vietnam for installation.

On Scillonian IV, these will power the windlass and gangway davits, and on Menawethan, the unit will power the deck hatches, cargo crane, pallet lift, side door, bow thrusters, windlass and the fore and aft capstans.

Wills Ridley has designed and manufactured hydraulic steering gear, electrical controls and rudders since 1963. With agents in 32 countries, it supplies the commercial, military, and superyacht marine sectors.

The components for the steering gears will be manufactured at Wills Ridley’s factory in Penryn before being installed and tested in Vietnam.

The electrical controls for Scillonian IV and Menawethan utilise state-of-the-art technology. There are multiple steering positions where the rudders can be controlled independently, and there is an option for the rudders to be synchronised electrically. The steering system must interface with other electrical systems, such as the autopilot.

As part of the safety system on board the two vessels, the steering gear is designed and manufactured in accordance with Lloyds Register of Shipping rules.

Stuart Reid, Chief Executive of the Isles of Scilly Steamship Group, said: “I am delighted that our trusted and valued relationships with Armada and Wills Ridley will continue, with the companies not only supplying the new hydraulic and steering systems, but providing ongoing technical support for the new vessels.”

Joff Collins, Managing Director of Armada, said: “We are genuinely honoured to be continuing our long association with the Isles of Scilly Steamship Group. We’ve been providing maintenance support to the Group’s fleet of vessels for 30 plus years, so we understand what a lifeline they are to the local community.

“I’d like to thank the Steamship Group for a successful partnership spanning three decades, and to our technical director Alan Rowe for bringing this project to fruition with the help of our in-house design team Mike Tonkin, Murray Walker and Ben Rowe.”

Ryan Kitchener, Director of Wills Ridley, said: “These vessels have been discussed for many years, and it is great to see the project come to fruition. As a proud Cornishman, it is very rare to work on new-build vessels of this size that will operate on our doorstep. Everyone at Wills Ridley is excited to be part of this project.

“I look forward to attending the sea trials and using Scillonian IV in future as a passenger with friends and family once the vessels are in service.”

Scillonian IV and Menawethan are being built by Piriou, and are on schedule to be delivered in 2026 to meet the travel and freight requirements of the Isles of Scilly for generations to come.

The new vessels will feature a range of new technologies, helping to improve resilience, comfort and reliability. Scillonian IV will carry up to 600 people (a 24% increase on current levels) whilst reducing journey times. It will feature roll and pitch reduction systems, to enhance passenger comfort, and is designed utilising modern propulsion technologies that improve efficiency and reduce environmental impact. The vessel is also designed to integrate further enhancements as technology develops.

Menawethan will also include a range of improvements on the current vessel, including a much-enhanced cargo capacity and an improved capacity for perishable, chilled and frozen goods, meaning that supplies can be transferred between the mainland and the islands more reliably all year round. The freight vessel will incorporate a passenger lounge with accommodation for 12 passengers.


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Menawethan now resembles a ship, with all hull blocks now in the building dock.

On 21st January, the “mega block” comprising units 1, 2, 6 and 7 (the main engine room, keel block and aft part of the upper cargo hold) was lifted from the dockside and successfully integrated with the fore part of the hull.

With the complete hull now in place, only four blocks remain to be added – unit 11, which includes the wheelhouse, passenger lounge and crew accommodation, and is currently under construction in the fabrication shop; unit 12, the engine casing, which is ready and waiting on the dockside; unit 13, the forward bulwark, which is under construction; and unit 14, the cargo elevator upper casing, which is complete and ready for integration.

As well as the hull structure fabrication a huge amount of system piping (ballast, bilge, fuel oil, scuppers, lub oil and fresh water) have been fabricated and installed within the hull blocks.


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It’s been a busy start to 2025 for several members of the project team who have been travelling around Europe visiting suppliers.

Chris Lingham and Scillonian III marine engineer Sam Noye have been in Nantes, France, visiting Mecatlantic, to attend factory acceptance tests for some of the electrical generator sets for both Scillonian IV and Menawethan.

Chris then travelled to Ghent, Belgium, for the factory acceptance tests (FAT) of the first main engine for Scillonian IV at the ABC factory on Friday 10th January. He then went to Bergen, Norway, to attend FAT for the pallet hoist control system, manufactured by MacGregor, before returning to Ghent for FAT of the second main engine for Scillonian IV, on Friday 17th January.

Sam remained in Nantes to complete the FAT for the generators with Mecatlantic.

Scillonian III Master Dave Redgrave and Gry Maritha Master Tom Sexton have been in Poland visiting MacGregor, the factory making the pallet hoist and side door for Menawethan and witnessing the FAT.

The factory acceptance tests include testing of the machinery safety systems and performance of the equipment enabling any issues to be identified before the machinery is delivered to the shipyard. Our classification surveyors, Lloyd’s Register, will attend the FATs for the main engines, generators, electrical switchboards, gearboxes, etc and issue certificates on completion of satisfactory test, as part of the supply chain quality assurance process.

Piriou and ISSG attend the factory acceptance tests to verify the performance of the machinery and confirm that it functions correctly and in accordance with specification. Should there be any issues, these can be addressed and resolved prior to the machinery being delivered to the shipyard.


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We have seen substantial progress in our new cargo vessel’s construction since our last newsletter, with significant developments across major hull block fabrication.

Hull Block U1: Engine Room and Steering Gear

This intricate block is currently being fabricated in the building dock. It is designed to accommodate critical systems like engine beds, steering gear, propeller shafts, rudders, and double bottom tanks.

Hull Block U10: Bow Block

The bow block is progressing well and is being fabricated in two sections, upper and lower, in the workshop. This bow block will incorporate the bulbous bow, bow thruster tunnels, and anchor chain lockers.

Hull Block U8: Upper Hold

Designed with an opening for the cargo hatch and side access for the cargo hoist, this block will soon be positioned on top of the fully integrated blocks U4, U5, and U6 in the building dock. This addition will help shape the vessel’s cargo hold structure.

Lower Hold and Double Bottom Blocks (U4, U5 & U6)

The integration of blocks U4, U5, and U6 has been successfully completed within the building dock, forming a solid base for the cargo hold. Painting of the underwater areas has started with localized shot blasting and painting of the flat bottom and keel plate, using International Paints’ anticorrosive coatings to protect against corrosion and two coats of antifouling paint to prevent marine growth.


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Our new freight vessel will be named Menawethan, after one of the 12 uninhabited Eastern Isles.

The islands bring to mind exquisite natural beauty, history and wildlife, and we wanted a name that encapsulates these elements.

Three names were put to the island community to vote, with Menawethan coming out on top.

Menawethan is home to seals and seabirds and is a favourite spot for kayakers, divers and wildlife spotters. It is a steep-sided island, known in Cornish as Men an Wedhen, meaning the tree stone.

Stuart Reid, Chief Executive of the Isles of Scilly Steamship Company, said: “We’d like to say thank you to the Isles of Scilly community  in helping us name our new freight vessel. Such an important vessel to the islands deserves a name chosen by islanders, and I can’t think of a more fitting name than Menawethan.

“Building work on our two new ships is continuing at pace, with the keel laying ceremonies for both Menawethan and Scillonian IV taking place next month. We can’t wait to welcome them both into service in 2026.”


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Our new cargo vessel remains on schedule for delivery in early 2026. The vessel is being built through the assembly of 12 unique units as shown in the illustration below.

The subassemblies are fabricated under cover in a number of Piriou’s fabrication sheds and then integrated into the larger units, which are later lowered into the build dock for assembly. The steel construction of units three, four and five is now complete and has been inspected and approved by Lloyd’s Register surveyors and our own team on site. Construction of units one and two is ongoing and steel cutting for units eight and nine is underway.

Photo diary

Peter Broad has been keeping a photo diary of the new vessels’ construction in Vietnam, the below shows part of the cargo vessel construction process.

Unit 3

Unit 4

Unit 5

Unit 5