A wooden boat thought to date back more than 1,500 years is to be raised from its resting place on the Hampshire coast.
The site is inaccessible when the tide is in
Archaeologists are to attempt to raise the canoe from the intertidal mud of Langstone Harbour, near Portsmouth.
The boat, hollowed out of an oak tree trunk, is only the second of its kind to be found in the Solent since the 1880s.
It is thought to date back to 500 AD.
It was discovered in March 2002 by John Cross and Arthur Mack, who spotted one end of the canoe protruding from the mud.
On closer examination, they realised it was worked timber.
A team of archaeologists and specialists are now to construct a cage around the boat and use lifting bags to bring up the cage.
It will then be transported by boat to the Southampton Oceanography Centre.
Post-excavation analysis will be carried out on the boat before it is sent to the Mary Rose Trust for conservation.
Julie Satchell, from the Hampshire and Wight Trust for Maritime Archaeology, said: "The log boat gives us a rare chance to glimpse the world of the Dark Ages.
"Few finds from this period have been discovered and preserved and organic remains are rarer still.
"We hope it will reveal evidence of woodworking technology and craft, as well as clues about the sea level during this period."