The Greek Public Ports Authority (PPA) has dramatically increased the budget for its tender to raise the wreck of the cruiseship Sea Diamond from the coast off Santorini to €434m ($480m) after its initial tender flopped.

The move appears to be aimed at generating more interest among salvors for the job.

Late last month, the PPA, along with the Ministry of Shipping and Maritime Affairs, issued a tender for salvors to bid for the job at a price of €62m, including tax.