ANSA somewhat clears up my confusion from the other day:

An ancient Greek trading ship that had lain on the seabed off the coast of Gela in southern Sicily for 2,500 years was brought to the surface for the first time on Monday. The ancient Greek vessel is 21 metres long and 6.5 metres wide, making it by far the biggest of its kind ever discovered. Four Greek vessels found off the coasts of Israel, Cyprus and France are at most 15 metres long.

The one in Gela is also of particular value for scholars who will be able to delve into Greek naval construction techniques thanks to the amazing find of still-intact hemp ropes used to 'sew' together the pine planks in its hull - a technique described in Homer's Iliad. ''Gela's ancient ship is the patrimony not only of Sicily but of all humanity,'' said Sicily's regional councillor for culture Antonello Antinoro, who watched Monday's operation.

The campaign to bring the vessel to the surface began shortly after two scuba divers located it by chance in 1988.

Archaeologists believe the ship sank in a storm some 800 metres off the coast while transporting goods from the Greek colony in Gela back to Greece in around 500 BC.

The bow of the ship, along with an astounding array of amphorae, drinking cups, oil lamps and woven baskets, were brought to the surface in 2003. On Monday coastguards and experts from the Caltanissetta culture department salvaged the rest of the vessel using a boat equipped with a crane able to lift loads of up to 200 tonnes.

Around 20 other support craft joined the operation, sounding their fog horns when the wreck finally emerged from the water.

UK TEAM TO RECONSTRUCT SHIP.

Sicilian archaeologists have long hoped that the find will convince the world that Gela played a key role in ancient times as a major trading centre in the Mediterranean.

Local officials hope the vessel will also turn the city into an attraction for culture lovers. ''This moment signals the rebirth of Gela,'' said culture department head Rosalba Panvini. ''The city's real history has emerged after 2,500 years, but the story doesn't end here,'' she added.

The pieces of the ship will be kept immersed in tanks full of the protective chemical polyethylene glycol before being transported to Portsmouth in the United Kingdom, where experts at the Mary Rose Archaeological Services will conserve and reconstruct the vessel. The culture department says it eventually plans to build a sea museum in Gela with the ship as the key exhibit.

Antinoro said Sicily's regional government was meanwhile raising the funds to recover another ship discovered near the ancient Greek vessel ''in the next few months''.

Gela was founded by settlers from Rhodes and Crete in the late 7th century BC and saw its pinnacle under the tyrants Hippocrates and Gelon, who also conquered neighbouring Syracuse.

The city gradually lost its political importance although it still played a major cultural role and the Greek playwright Aeschylus spent the last years of his life there.

It was destroyed and rebuilt many times and reconstructed by Frederick II in 1233.

... so presumably what was taken to Portsmouth a few years ago was just part of this ship ...

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UPDATE
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The BBC has a (presumably) nice video report ... (I couldn't get the sound to work)