"Vulcano" temporarily blocked the entrance to Gijon of the British merchants "Stanray" and "Stangrove". At the end of the war in the north she joined a naval squadron which drove back the steamers "Hillfern", "Bramhill", "Stanhill" and "Stanleigh" off Cape Peñas, seizing a number of small Republican vessels crowded with refugees in the process. During this period she shelled, without success, the British "Thorpebay" when this steamer entered the port of the Musel. Between the last months of 1937 and 1939 "Vulcano" was active in the Mediterranean, where she was part of the rebel fleet which bombarded Castellon, Burriana and Vinaròs on Christmas Day 1937. She played a key role, along with her sisters ships, in ferrying troops after Franco's army reach the coast between Valencia and Barcelona in April 1938.