Roskilde Viking Ship Museum takes part in underwater research on 500-year-old shipwreck

The Roskilde Viking Ship Museum has taken part in this year's underwater archaeological dives to discover the extraordinary Gribshunden ships.
Divers are researching the wreckage of the Gribshunden, the royal flagship of Denmark's King Hans.
The ship belonged to King Hans of Denmark, and it mysteriously sank off the coast of Ronneby in southern Sweden in 1495.

The find is the world's best-preserved ship from the time of Columbus and Vasco da Gama, and the ship's discovery has drawn international attention.
"No other ship from the time of the great voyages of discovery has been so well preserved and intact," said lead researcher Brendan Foley of Lund University.
How big is the ship? How did it work? How did it sink in? These are some of the questions that scientific studies hope to answer.
According to the Viking Ship Museum's website, investigations have already uncovered several new discoveries and unknown construction details of the shipwreck.
During archaeological investigations this year, experts identified the cube and the six-meter-long rudder.
The discovery of the rudder and tiller gives archaeologists for the first time an insight into the technology that enabled ships to be steered from this period.
"We've never been able to definitively test an object and technology like this before," Foley noted.
Special attention has been paid to the construction of the ship during the scientific diving survey which is carried out at a depth of 10 meters.
For the past few weeks, researchers and maritime archaeologists from Lund University, the Bleking Museum and the Viking Ship Museum in Roskilde have been working hard to extract information from the world-famous ship that could tell them more about how the ship was built.
Divers have also uncovered structural parts of the ship and made unusual and rare discoveries: medieval firearms, cannon lavatories and ceramics.
These objects reveal information about the ship's use and the medieval society aboard the ship for its final voyage.
Advanced technology is used
Completely new, advanced technology has been used to reveal the secrets of medieval shipbuilders.
Marine archaeologists have used photometry to measure the six-meter-long rudder. The steering wheel is now 3D-documented, so researchers can recreate a digital version of the rare find.
Tillers and other small structural parts of the ship have also been salvaged and will be documented and 3D modeled on land.
With 3D models, researchers will be able to study new discoveries and, at the same time, show highly accurate photos of the ship and the objects found to the wider public.
The project is a collaboration between maritime archaeologists and ship experts from Lund University's Digital Archeology Laboratory (DARK lab), Blekinge Museum and the Viking Ship Museum. The project is supported by the Länsstyrelsen of Blekinge.
Viking Ship Museum marine archaeologists Marie Johnson and Michael H. Mr. and Mrs. Thomson have participated in this year's tests. Among other things, they contributed their expertise in shipbuilding and underwater archaeological excavations.

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