Hvalur 9 RE399 is an Icelandic whaling ship built in 1952 in Norway. It has been a part of the Icelandic whaling fleet operated and owned by the company Hvalur h/f since 1966. In 1973 she was requisitioned by the Icelandic Coast Guard, repainted, renamed Týr and armed with a 57 mm gun and subsequently used to cut the fishing gear from foreign fishing vessels fishing illegally (according to Icelandic law) in a newly claimed fishery zone during the Second Cod War. During her service in the Coast Guard she was usually nicknamed Hval-Týr to differentiate from previously commissioned patrol vessels of the same name.