Since the beginning, "Tempera" and "Mastera" were used primarily for year-round transportation of crude oil from the Russian oil terminal of Primorsk to company's own oil terminals in Porvoo and Naantali, where they have been the only ships capable of operating without delays or problems during the harshest winters. Occasionally they have carried cargoes in the Gulf of Bothnia and even outside the Baltic Sea depending on the amount of oil in the refineries' storage tanks. "Tempera" has also visited Murmansk, where she loaded crude oil from FSO "Belokamenka". However, due to draft restrictions the ships could not carry a full cargo of 100,000 tons to the port of Naantali until April 2010 — they had to stop at Porvoo on the way and unload 20,000 tons of oil to reduce the draft of the vessel.