The Diamantgracht's deck cargo from New Zealand is expected to be worth more than its main cargo – a hull full of onions bound for Europe.

The Spliethoff ship is carrying on its deck about 10 boats, including Skype founder Niklas Zennstrom's RAN.

The boat Carpe Diem is loaded aboard the ship Diamantgracht.

The 72ft English yacht was shipped to the southern hemisphere to compete in the Boxing Day Sydney Hobart race. Also on board is the pocket superyacht, the Australian owned 29m Alcanara, recently moored off the bridge marina's northern breakwater.

The launch Matelot was also berthed at the marina while the Diamantgracht loaded onions as was the yacht Carpe Diem – one of the last boats to be loaded on Thursday afternoon.

The deck cargo is a combination of boats in transit like RAN, and New Zealand loadings.

They are following the summer north and will be discharged at Gibralter or Dutch or British ports, says agent ISS Mckay Ltd.

During cargo operations, some of the boats were stowed on the wharf or the marina or like one large motor yacht – left on board.

Luxury boats line the deck of the cargo ship Diamantgracht.