Three-dimensional images of the wrecks of German warships scuttled in 1919 off Orkney have been released.
The German fleet was scuttled at Scapa Flow in 1919
Experts carried out a week-long study of the seven vessels at historic Scapa Flow by monitoring the wreckage and surrounding seabed.
The survey used high-resolution sonar, which scanned the ships from the sea surface to generate 3D images.
They will be used to update nautical charts, analyse how wrecks deteriorate, and to assist divers.
The wrecks are the only remains of the large vessels of the German High Seas Fleet, scuttled in June 1919.
The three battleships and four light cruisers are legally protected as scheduled ancient monuments of national importance.
The study was undertaken by a consortium of organisations including Historic Scotland and Scientific Underwater Logistics And Diving (Sula).
Phillip Robertson, of Historic Scotland, said: "By comparing this year's work with previous surveys, we will begin to understand the extent to which these wrecks are deteriorating and how we approach their continued management.
"In the short term, the images will hopefully enhance understanding and appreciation of these monuments by charter boat owners and divers whose vigilance we depend on to assist in the protection of the scheduled wrecks."
Bobby Forbes, of Sula Diving, said: "Over the last few years data analysis processes have advanced significantly, allowing high-quality imagery."