New Vessels Update | October Newsletter

Introduction

Since our last update in August, we’ve reached a number of key milestones across both Scillonian IV and Menawethan. From confirmed delivery schedules and progress on structural work to systems testing and interior outfitting, construction continues at pace in Vietnam.

Vessel delivery update

At the end of August, we proudly announced the confirmed delivery schedules for our two new vessels – a major milestone in our vessel replacement programme and one of the biggest investments in lifeline transport for the Isles of Scilly.

Menawethan, our new freight vessel, remains on track for delivery in spring 2026.

Scillonian IV, our next-generation passenger ferry, will now enter service in March 2027, offering faster journey times, increased comfort, and enhanced environmental performance. The slight adjustment to her schedule is due to global supply chain factors and the longer delivery route, but with confirmed dates, both vessels are set to deliver modern, reliable, and sustainable transport for the islands for decades to come. A true once-in-a-generation investment.

In the meantime, Scillonian III will continue serving passengers through the 2026 season, with her regular maintenance ensuring she remains dependable while our new vessels are completed.

CGI image of Scillonian IV and Menawethan sailing - July 2025

Next major milestones

An illustration of the launch process of Menawethan at Piriou shipyard

Click the image to enlarge.

Menawethan launch

On 31st October 2025, Menawethan will make her grand launch – coming afloat for the very first time, marking a huge milestone in her journey. The shipyard is currently working on final preparations for her launch including the last application of paint followed by the removal of scaffolding around her hull.

The launch process will involve flooding the dock and carefully floating Menawethan out of the gates so she can be towed to the outfitting berth. The process is expected to take around four hours and marks the start of the final phase of her build. The undocking will be carried out through the night to coincide with the high tide and less river traffic to disrupt the process.

Menawethan

Following the launch of Menawethan, commissioning of the vessel will begin on 1st November. This process includes running and testing the generator sets, side door, pallet hoist, main engines and propulsion systems, hydraulics and electrical systems, in accordance with the shipbuilding specification and Lloyd’s Register rules. This, with thorough function testing of all systems and equipment, will take approximately three months before she undertakes her week-long sea trials scheduled to take place at the end of January 2026.

The vessel will travel down river to the open sea, near Vung Tau, to demonstrate the full function test of all systems and the ship’s sea keeping performance in the open sea. The commissioning and sea trials process is to ensure everything performs perfectly ahead of preparations for her delivery voyage to the UK via France at the end of March.

Preparations for the launch are well underway.  The river in front of the dock entrance gates is being dredged to clear built-up silt and ensure a smooth exit, logos have been applied to the vessel’s hull, and rubber fendering is being fitted.

To document the event, a timelapse and a series of images will be captured to show this exciting moment, giving a behind-the-scenes glimpse of the launch.

Scillonian IV

Once Menawethan is safely floated out, construction work will continue on Scillonian IV in the building dock. Following this, Scillonian IV’s bow megablock will then be placed in the dock for integration, some days after the launching.

This process is a demonstration of precision planning and progress at the yard.

computer generated image of steamship groups new freight vessel menawethan

Menawethan

31st October 2025 – Launch

Menawethan will exit the dock for the first time, marking the start of the final phase of her build.

1st November 2025 – Commissioning begins

Testing and running of the vessel’s systems and equipment will get underway.

January 2026 – Sea trials

A week-long programme of sea trials will take place down the delta to test performance and handling with Steamship crew representatives.

March 2026 – Delivery voyage

Menawethan will begin her journey from Vietnam to Europe.

April 2026 – Arrival in France

The vessel will arrive in France for final preparations ahead of delivery.

May 2026 – Arrival in the UK

Menawethan is due to arrive in the UK ahead of crew familiarisation, training, and final checks before entering service.

computer generated image of steamship groups new passenger vessel Scillonian 4

Scillonian IV

March 2026 – Launch

Scillonian IV will be launched from the dock, beginning the next stage of her build.

June 2026 – Sea trials

A week-long programme of sea trials will take place down the delta to test vessel performance and handling.

July 2026 – Delivery voyage

The vessel will begin her journey from Vietnam to Europe.

September 2026 – Arrival in France

Scillonian IV will arrive in France for final preparations ahead of UK delivery.

October 2026 – Arrival in the UK

The vessel will reach the UK to begin berthing trials and crew familiarisation training.

March 2027 – Entry into service

Following successful trials and training, Scillonian IV will enter passenger service, delivering faster, more comfortable, and sustainable travel to the Isles of Scilly.


Vietnam to Europe

illustration map showing scillonian iv's new planned route from vietnam to europe

Click the image to enlarge.

Route

Menawethan will begin her voyage later this year, departing Vietnam in December 2025 and arriving in the UK in May 2026, ahead of entering service.

Once complete, Scillonian IV will sail under her own power from Vietnam to the UK. While the original plan was to transit via the Suez Canal, advice from officials due to ongoing instability in the Middle East means the vessel will now travel around the Cape of Good Hope, adding approximately 40 days to her delivery journey.


Recent news bites

In case you missed it, here’s a recap of our updates since our last newsletter in August.

Photo of Mayor of Concarneau in front of Skybus with ISSG members

Mayor of Concarneau visits St Mary’s

In September, we were delighted to welcome the Mayor of Concarneau, Marc Bigot, and his wife Christine to Land’s End Airport for a day trip to St Mary’s. With Piriou’s strong ties to Concarneau – it was a particularly special visit.
Photo of Scillonian Iv's bow mega block being lifted by goliath crane at piriou vietnam

Scillonian IV bow megablock moved

Earlier this month, the bow megablock for Scillonian IV was structurally completed and relocated to the head of the dock, keeping the construction and painting areas cleaner and ready for blasting and painting.
Illustration of vessel hull vane underwater

Hull Vane podcast

Also in September, we released a podcast featuring Arjen Barendse from Hull Vane discussing the innovative technology being installed on Scillonian IV. The conversation explores how Hull Vane improves fuel efficiency, sustainability, and passenger comfort, helping to shape the future of travel to the Isles of Scilly.
Stuart Reid in the BBC Radio Cornwall studio interviewed about ISSG's new vessels

Stuart on Radio Cornwall

Our CEO, Stuart Reid, joined BBC Radio Cornwall to discuss the importance of our lifeline services and provide updates on the arrival of our new vessels. He highlighted the benefits for passengers, freight, and visitors alike – a major step forward for Scilly’s transport network.

Hull Vane updates

Podcast and installation

Listen to the podcast below to understand more about what the Hull Vane is and how it works.

Site manager, Peter Broad, talks us through the lifting into place of Hull Vane on Scillonian IV – a significant build milestone.


Visits to Vietnam

In our last newsletter, we wrote about Technical Superintendent, Luke Parnell’s initial visit to Vietnam to familiarise himself with Scillonian IV and Menawethan and oversee key stages of construction.

Following this, Luke returned for a two-week period to join the team on-site and provide cover for Chris and Peter during their annual leave.

During this visit, he continued to monitor progress across both vessels, from structural work and systems testing to inspections and final preparations.

Photo of Scillonian Iv's bow mega block being lifted by goliath crane at piriou vietnam Testing Menawethan's door seals with water hose tests at Piriou shipyard Vietnam Image of part of ISSG's new vessels being constructed by Piriou in Vietnam

Scillonian IV | Build progress

Machinery and technical spaces

Installation of machinery, equipment, piping, valves, and ducting is ongoing in the engine room, auxiliary room, and technical spaces. The rudder trunks and outer stern tubes have been installed. The Hull Vane has been lifted into place and is now being welded to the transom. The two hydraulic gangway davits have been fitted onboard.

Hull and painting progress

Work on the underwater hull is progressing well, with blasting and first coat painting continuing despite weather challenges. Almost all flat bottom areas and turn of bilge have received their first coat, and the bow megablock (MB-06), which remains on the dockside, is 75% painted internally, with just the lower forward hold remaining. The external passenger side doors and the emergency evacuation doors (MES System) have been fitted into the hull.

Passenger and crew areas and interiors

Installation of floating floors and cabling in the deck 3 lounge is progressing well. Framing to support bulkhead panels and window boxes is ongoing on deck 4. Ventilation trunking installation continues in the wheelhouse. Crew accommodation areas, floors and bulkheads, are also being prepared for outfitting.

Quality checks and quality and interiors

Piriou is actively working though the schedule of inspections and testing, addressing any outstanding items identified by the site team, and Lloyd’s Register, with ongoing inspections to ensure workmanship and compliance with specifications remain at the highest standard.

Electrical and cabling

Work continues throughout the vessel with electric cabling in the engine control room and main switchboard, auxiliary room, passenger and crew areas and up to the wheelhouse.

Next steps

Detailed design reviews and plan approval are nearing completion. Production and outfitting work onboard will step up from November after  Menawethan has launched and more Piriou labour force will move onto Scillonian IV.

 


Menawethan | Build progress

Menawethan’s side door operations have been tested this week, with pallet hoist testing to take place to follow.

Photo showing testing of Menawethan's side door
Machinery and technical spaces

Installation of machinery, piping, valves, and related equipment is progressing well. The rescue boat davit is installed, along with windlass and anchor chain stoppers. Temporary shore power has been connected to operate the hydraulic systems for the side door and pallet lift.

The cargo crane is due to be delivered to the shipyard this week and installed.

Hull and painting progress

All hull structural tests are complete. Work continues with the 5-coat antifouling system, and areas of the hull have been blasted and painted following docking block relocation. Blue paint is progressing well on the topsides of the hull and white around the wheelhouse areas. All the hull markings, names and logos have been painted in white on the port and starboard bow and stern. The specially designed rubber fenders have been fitted to the hull on the port and starboard sides.

Accommodation and interiors

Crew and passenger accommodation work continues, including ceiling panels, window boxes, and furniture installation.

Electrical and cabling

A total of 51km of electrical cable is being installed, with termination work is ongoing. Wheelhouse console wiring and installation of electrical equipment are progressing steadily.

Quality checks and commissioning

Working closely with the shipyard quality management team the ISSG site teams are steadily completing the quality checks and finishing touches to the hull before launching. The first stage commissioning of the pallet hoist and side door is taking place with the McGregor engineer in attendance and working closely with the shipyard.

Next steps

Once the vessel launches at the end of October there will be a period of commissioning and testing of all the onboard equipment before the sea trials scheduled for early 2026. The sea trials are carried out to ensure that the vessel performs in accordance the shipbuilding specification and for class and statutory compliance. Preparations are progressing well with Piriou and Lloyd’s Register for the delivery voyage of the vessel from Vietnam to UK. ISSG is planning for service entry, crewing, certification, and familiarisation, when the vessel arrives in Penzance.

 


Keep up to date

Keep up to date on the progress of our vessel replacement project across our social media channels and website, where you will find the latest newsletters, podcasts, photos, films and more.

Isles of Scilly Steamship Group – LinkedIn

Isles of Scilly Travel – Facebook

Isles of Scilly Freight – Facebook

Front view CGI image of Scillonian IV and Menawethan