MT Tempera is a Finnish Aframax crude oil tanker operated by Neste Shipping. She was the first ship to utilize the double acting tanker (DAT) concept, developed by Aker Arctic, in which the vessel is designed to travel ahead in open water and astern in severe ice conditions. Tempera and her sister ship Mastera, built in 2003, are used mainly to transport crude oil, year-round, from the Russian oil terminal in Primorsk to Neste Oil refineries in Porvoo and Naantali.