STX Norway Offshore has signed a contract to build two icebreaking tugs for JSC Circle Marine Invest for NOK 450 million. The units will be delivered in 2011. The vessels will be deployed in the Kashagan field of the northern Caspian Sea. The vessels, designed by the STX Europe subsidiary Aker Arctic, have a length of 65 meters and a width of 16,4 meters. The vessels will have the Ice class notification 1A Super, according to the Finnish-Swedish Ice classification rules.