 In August 1915, "V108" took part in the Battle of the Gulf of Riga, an attempt by German forces, supported by the High Seas Fleet, to enter the Gulf of Riga, destroy Russian naval forces in the Gulf and to mine the northern entrances to the Gulf in order to prevent Russian reinforcement.The attempt failed with Germany losing the torpedo boats and and the minesweeper "T46", while failing to destroy any major Russian warships or lay the planned minefield.On 20 August, in one of the last actions of the battle, "V108" took part in an attack on Pernau, with blockships being used to block the entrance to the harbour.