ICGV Týr is an Ægir-class offshore patrol vessel and the former flagship of the Icelandic Coast Guard. The ship was built by Dannebrog Værft in Denmark in 1974–1975 and entered service in 1975. Týr was for a time the second largest ship in the Icelandic Coast Guard and participated in the Third Cod War. The ship conducted patrols, search and rescue, fishery inspections, general law enforcement and counter-terrorism operations in the Icelandic exclusive economic zone and the waters of the surrounding territories, such as Greenland and Jan Mayen. Týr was decommissioned in 2021 and sold in 2022.

A patrol boat is a relatively small naval vessel generally designed for coastal defence, border security, or law enforcement. There are many designs for patrol boats, and they generally range in size. They may be operated by a nation's navy, coast guard, police, or customs, and may be intended for marine, estuarine, or river environments.