In April 1935 Panteleyev returned to the Black Sea Fleet as the commander of the 1st submarine brigade until November 1936, and then until August 1938 as commander of the 2nd submarine brigade. In summer 1938 he was transferred to the Navy Commissariat and from August 1938 to October 1939 was member, and then deputy chairman of the State Commission for the Acceptance of Ships. It was at this time that Admiral
Ivan Yumashev, then commander of the
Pacific Fleet, requested that Panteleyev serve as commander of his minesweeping brigade. Panteleyev agreed, but the appointment was blocked by Naval commissioner
Nikolai Kuznetsov, who anticipating trouble with Finland, arranged with
Stalin to appoint Panteleyev as chief of staff of the
Baltic Fleet.
Minsk, Panteleyev's ship during operations in the
Gulf of Finland during the
Soviet-Finnish War In October 1939 Panteleyev became acting chief of staff of the
Baltic Fleet, and in June 1940 was confirmed in post, holding this position until 29 August 1941. During the
Soviet-Finnish War the Baltic Fleet deployed submarines and patrol ships in the
Gulf of Finland, while carrying out air reconnaissance and providing supporting fire against fort artillery. Panteleyev personally carried out reconnaissance of the island of Kopisari, at the entrance to the port of
Kotka. His detachment, consisting of the
destroyer leader Minsk, two destroyers and several supporting vessels approached the island, but came under fire from a Finnish battery. The Soviets were unable to suppress the Finnish guns and had difficulty in firing on coastal targets because of a lack of spotters to observe the fall of shots. During the battle a shell fragment fell into the fur collar of Panteleyev's coat, a fragment he kept as a souvenir. Promoted to rear admiral on 4 June 1940 Panteleyev was one of the officers based at the fleet headquarters at
Tallinn as the possibility of war with
Nazi Germany became ever greater. ==Great Patriotic War==