Relatives of the seamen who fought in the Battle of Jutland have been asked to share their stories to mark its centenary.
More than 8,000 men died off the coast of Jutland, Denmark, in the 36-hour battle which began on May 31, 1916 - the largest naval battle of the First World War.
The British Grand Fleet sailed from Rosyth, Cromarty and Scapa Flow to repel the German High Seas Fleet fighting to break a British blockade.
Both sides claimed victory as the Germans lost 11 ships and Britain lost 14, but the German surface fleet failed to significantly challenge the British again during the war.
To mark the centenary, Imperial War Museums (IWM) is seeking contributions for a permanent digital memorial, Lives of the First World War.
TV broadcaster and naval historian Dan Snow said: "Jutland is one of the greatest sea battles of all time.
"It decisively affected the outcome of the First World War and thus the course of the twentieth century.
"It was the apogee of 400 years of naval warfare which saw battleships fire guns at each other; the last major battle before the advent of aircraft changed war at sea forever.
"The experience of the men involved or the terrible fate of those sailors trapped on doomed ships deserve to be remembered.
"Digital memorials like Lives of the First World War help to ensure that they will be".