"USSDonaldCook begins southbound transit to the #Mediterranean Sea after completing a successful patrol on the #BlackSea in support of @NATO Allies & Partners", the naval press service said on Twitter.
The ship entered the Black Sea on 23 November and conducted air defence exercises with NATO allies, the statement said.
US Destroyer Donald Cook Heading to Mediterranean After Patrol Mission in Black Sea
© REUTERS / US Navy
The US 6th Fleet, which is headquartered in the Italian city of Naples, conducts a full range of naval operations, often with allied and interdepartmental partners, to promote national interests, as well as provide security and stability in Europe and Africa.