 "Opal" took part in the Battle of Jutland where the Twelfth Flotilla supported the Grand Fleet, and both attacked and was attacked during the general action.She also participated in other major fleet sorties during the next two years as well as pursuing her regular duties of minesweeping, convoy protection and anti-submarine patrols in the North Sea.On 24 July 1917, "Opal" and the destroyer were escorting an east-bound convoy on the Scandinavian (Lerwick–Norway) route, when the convoy came under attack by the German submarine , which fired two torpedoes from distance at the convoy, one of which hit and sunk the Swedish merchant ship .