HDMS Vædderen (F359)

HDMS (Her Danish Majesty's Ship) Vædderen (F359) is a Thetis-class ocean patrol vessel of the Royal Danish Navy. She is employed to exercise Danish sovereignty in waters around the Faroe Islands and Greenland.

Vædderen (Aries) was recently refitted at Karstensens Shipyard A/S in Skagen, Denmark and sailed from Amailiehaven, Copenhagen in August 2006 on the Galathea 3 scientific expedition. Galathea 3 is now complete and Vædderen is back in service as an inspection ship.

In August 2010 the Vædderen and the HDMS ''Knud Rasmussen participated in the fourth annual Operation Nanook 2010 with Canadian and American vessels in Baffin Bay and the Davis Straits.