ICGV Óðinn is a decommissioned offshore patrol vessel formerly operated by the Icelandic Coast Guard. She is the oldest ship in the coastguard's fleet, and it is believed that her Burmeister & Wain engines are the only such engines that are still serviceable in the world today. Since her withdrawal from active duty, she has served as a floating exhibit at the Reykjavík Maritime Museum in Reykjavík Harbour. The ship is still maintained, and operative as of June 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.