The Russian fleet in Helsinki panicked when the Germans marched against Helsinki. They managed to secure a deal with the Germans, which allowed them to withdraw to Russia. However, only the largest ships managed to return to Russia, due to the harsh ice conditions of the Gulf of Finland. Numerous vessels were left behind to be seized by the "whites" and the German troops. On April 13, "Prozorlivy" was conquered by the "whites" and she was transferred to the Finnish navy, along with her five sister ships ("Ryany" (later "S1"), "Poslishny" ("S3"), "Rezvy" ("S4"), "Podvizhny" ("S5") and "No 212" ("S6")).