Isle of Man to flag New Zealand’s new Interislander ferries

Denmark’s OSK-ShipTech has designed the two 220m RoPax ferries, which will have a capacity of about 1,900 passengers and 3,600 lane metres. Denmark’s OSK-ShipTech has designed the two 220m RoPax ferries, which will have a capacity of about 1,900 passengers and 3,600 lane metres.
Industry Database

State-owned transport operator KiwiRail has appointed the Isle of Man Ship Registry as the newbuilding Flag for two rail-enabled RoPax ferries that will connect New Zealand’s North and South Islands.

KiwiRail issued an Expression of Interest to international shipyards last year, and the selection of a successful shipyard is due to be completed in the next few months. The Isle of Man Ship Registry will appoint and work in partnership with KiwiRail’s chosen classification society, overseeing the build process once a shipyard has been confirmed. The ships are targeted to enter service in the mid-2020s, replacing the existing three-vessel Interislander fleet.

The two 220m RoPax ferries, which are being designed by Denmark’s OSK-ShipTech, will each be capable of carrying about 1,900 passengers. They will also have a capacity of approximately 3,600 lane metres, allowing them to transport a combination of vehicles including up to 40 sixty-foot rail wagons.

Chris Martin, a Senior Surveyor at the Isle of Man Ship Registry, said: “As these two sister vessels will be carrying passengers, cars, freight and rolling stock, they will be quite flexible in their capabilities. They will need to be able to turn-around in 60 minutes at peak times, so will have a dual-capability linkspan to allow rail freight and vehicles to load and unload at the same time.

“The ferries will also have to comply with quite stringent wave energy rules required for speeds in excess of 15 knots in the Marlborough Sounds, at the northern end of the South Island. This will require a very efficient hull form that must also have excellent seakeeping properties to deal with the often-challenging sea conditions experienced in this area of the world.”

Future-proofing

The vessels will be diesel electric hybrid power, with diesel generators and batteries providing electrical power for azimuth thruster propulsion. KiwiRail is focussed on maximising efficiency and incorporating environmental features to minimise CO2 emissions. This includes making the ferries adaptable to new fuel sources as they become available.

KiwiRail’s Interislander General Manager Walter Rushbrook says: “It is over 20 years since New Zealand introduced a brand-new purpose-built ferry to its fleet, and we expect the new ferries will provide another 30 years’ service. Future-proofing the vessels so they can become even more efficient in future is important to us, as our goal is to reduce KiwiRail’s carbon emissions by 30% by 2030 and become carbon neutral by 2050. We estimate that from day-one the new ferries will reduce the Interislander’s emissions by 40 per cent.”

KiwiRail’s Interislander service connects New Zealand’s State Highway and national rail networks between the capital city Wellington in the North Island and Picton in the South Island. The Interislander carries approximately 850,000 passengers, 250,000 cars and up to US$9.5 billion (NZ$14bn) worth of freight annually.

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