"The Waters Wrecked the Sky": The war at sea June 41-April 42
Pre-war, the Navy (RKKH) had the same notional role as the VVS – to protect the Soviet Union and to support the operations of the RKKA. In reality, apart from a small number of submarines delivered in late 1939 and a new heavy cruiser in 1940 it saw no investment pre-war either in equipment or training.
(RKKH June 1941-April 1942)
A large number of WW1 era submarines had been scrapped in August 1939 so that the small number of trained crews could be concentrated on the better equipment and the submarine forces formed into 3 active commands.
The 4 squadrons in the Baltic were ordered to interdict axis shipping off the North German force and off the Baltic states respectively. This would also provide an advance warning of any major German naval movements in the region.
Once Rumania entered the war, the Black Sea squadrons were split between raiding in the western Black Sea and in the Aegean (where Italian, and later Greek, shipping was vulnerable). Later on, this range was extended to the central Mediterranean to raid Italian convoys supplying their forces in North Africa.
Overall, for very few outright losses, these campaigns were incredibly sucessful:
(axis shipping sunk June 41- Dec 41)
(axis shipping sunk Jan 42-April 42)
The only major losses were in the Meditteranean at the Gulf of Bomba where several formations were caught near the surface.
These losses, and the overall sucesses, convinced the GKO to allocate some scarce resources of both industrial capacity and research to building more modern submarines and to the training and doctrinal development of the submarine arm.
Two of the main surface fleets were also frequently in action. In the Baltic, the fleet had helped to defend Leningrad in both major assaults and had been able to target German concentrations to the south of the city area.
(Baltic Fleet an anchor)
(refueling in the Gulf of Finland
In the third battle of Leningrad, the fleet took up a similar role but this time the Kriegsmarine intervened. After a short battle the Germans withdrew despite sinking a destroyer squadron.
At this time, intelligence reports indicated they had redeployed the Graf Zeppelin and at least one of the Bismarck or the Tirpitz to the Baltic. In view of this, Soviet surface operations in the Gulf of Finland were scaled back to avoid irreplaceable losses.
In the Black Sea area, the surface fleet had supported two major invasions of Rumania
(Soviet destroyer off Odessa during the March landings)
and sunk the small Rumanian navy as well as driving the Greek navy to shelter in port. This dominance was helped by LAGG-3s from the VVS
(LAGG3 at Sevastopol)
maintaining air superiority and driving off any interventions by axis naval bombers.
(Rumanian naval bomber)
However, by March it was clear that the main Italian navy was in a position to operate in the Black Sea.
(The Kirov from the Black Sea Fleet)
Three inconclusive actions were fought in early and mid March and although neither side lost any ships the Black Sea fleet was badly damaged.
This led to a temporary suspension of naval activity and urgent complaints to the British – if they did nothing else they should be able to keep the Regia Marina engaged in the Mediterranean, not free to operate in the Black Sea.
In addition, the RKKH, using the tradition of the Civil War, supported the RKKA using the network of great rivers. A small squadron on the lower Dniepr was crucial to the defense of Dnepropetrovsk
(Soviet navy on the Dniepr)
and Soviet river boats supported the various actions on the upper Volga and the Rybinsk Reservoir.
(Soviet gun boat from the Volga Squadron)
With the sucess of the winter offensive, Soviet planning started to think about how to deal with those Axis powers (particularly in Latin America, and, of course, Japan) or holdings (such as the UK) that were separated by sea. By mid-1942, a modest re-equipment programme was started that saw a steady improvement in both the size and quality of the RKKH. The first new destroyers were commenced on 8 May 1942 and would be ready in early 1943. At the same time more and more of the oldest destroyers and submarines were decomissioned.
(Soviet naval research - note how the combat experience has grown mainly due to the sub campaign)