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How old are the oak planks

Samples recently taken by the museum’s maritime archaeologists at the site of the discovery of two warships off Vaxholm have now been sent to Denmark for analysis.

We will soon find out whether the large warships, most likely sunk deliberately, at a wreckage site outside the island of Vaxholm are really the sister ships of the Vasa ship. A maritime archaeologist has sawn through the hard and sturdy oak planks, and the wooden samples are now being analysed in Denmark.

The wood samples can provide answers to exactly when the oak was felled and where it grew.

Watch a video showing how the dendrochronologist dates the wood by analysing the tree’s annual rings.

With wood samples from shipwrecks, dendrochronologists can determine not only the age of the wreck but also where the ship was built – and gain insights into maritime trade.