Completed in 1917, she played a minor role in the war as part of the Black Sea Fleet before the Russian Revolution began later that year.

Fidonasi carried enough fuel oil to give her a range of 1,850 nautical miles (3,430 km; 2,130 mi) at 18 knots (33 km/h; 21 mph).

After being added to the Black Sea Fleet ship list on 2 July 1915, Fidonisy was laid down in the Russud Shipyard in Nikolayev on 29 October 1915.

The following month, she was one of eight destroyers that patrolled off the west Anatolian coast and helped to sink 19 small sailing ships on 13–15 September 1917.

Between 30 September and 20 October the ship participated in multiple patrols attempting to interdict the delivery of coal to Istanbul; during this time, the Russian destroyers claimed to have sunk 1 steamship, 23 sailing vessels and captured 2 others.

The navy ceased offensive operations against the Central Powers in early November in response to the Bolshevik Decree on Peace before a formal Armistice was signed the next month.