Creating a new mezzanine level on the Manannan will help increase motorcycle capacity by 30 per cent.
The Steam Packet Company has commissioned the temporary infrastructure - which will be used during the TT and Festival of Motorcycling.
Around 300 more bikes will be able to be carried backwards and forwards each day - this TT more than 12,000 bikes travelled to, and from, the Island - a rise of eight per cent on the previous year.
Mark Woodward is the chief executive - he says it will be worth the financial investment:
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