German aircraft sighted Russian small naval units at Primorsko-Akhtarsk according to the German War Diary of Admiral Black Sea dated 4 September 1943

An item reported that in the partially by clouds covered harbour of Primorsko Akhtari [Primorsko-Akhtarsk at the coast of Sea of Azov] 2 motor gunboats, 2 small coastal vessels and 75 boats were sighted.

Source

German War Diary of Admiral, Black Sea 1-30 September 1943. Published by Department of the Navy. Washington, 1955.