Today marks 82 years to the day since 835 men and boys lost their lives when HMS Royal Oak was torpedoed inside Scapa Flow.
This morning a service took place at the Garden of Remembrance at Scapa, before wreaths were laid over the final resting place of the ship.
The battleship was torpedoed by German submarine U-47 in the early hours of October 14, 1939.
Members of the Royal Oak Association travelled from across the UK, joining locals to pay tribute to those who were lost, as did members of the Royal Navy Northern Diving Group, who changed the White Ensign on the hull of the ship.