The article is devoted activity of the Medical Service of the Navy during the Great Patriotic War. During the war the Navy has performed as an integral part of the Armed Forces, played a major role in the defensive and offensive operations. From the first days of the war medical service fleet faced extreme difficulties, to demand from the medical staff of hard work. During the war many problems of medical support for combat operations of the Navy were successfully solved. It was also important to solve complex problems in organizing and conducting medical evacuations via sea. A great attention during: the war was played to the search for optimal system medical evacuation support of naval forces.