Divers in race against time to unearth wreck of the Dannebroge before seabed becomes construction site

More than 200 years after being sunk by Admiral Horatio Nelson and the British fleet, a Danish warship has been discovered on the seabed of Copenhagen harbour by marine archaeologists.

Working in thick sediment and almost zero visibility 15 metres (49 feet) beneath the waves, divers are in a race against time to unearth the 19th-century wreck of the Dannebroge before it becomes a construction site in a new housing district being built off the Danish coast.

Denmark’s Viking Ship Museum, which is leading the months-long underwater excavations, announced its findings on Thursday, 225 years to the day since the Battle of Copenhagen in 1801.

“It’s a big part of the Danish national feeling,” said Morten Johansen, the museum’s head of maritime archaeology.