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:
Blood transfusion figures revealed
Road closures for hill climb events
Man denies causing £1,000 worth of damage to car
Benefits fraudster due for sentencing
Dandara backs Ballalockie campaign
Petition to give parents info on sex offenders
Sex education details sent to parents this week
Van driver fails breath test
