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Soviet Naval Battles - Baltic Sea during WW2 (re-done)

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Soviet cogitations: 150
Defected to the U.S.S.R.: 20 Feb 2010, 11:57
Resident Admiral
Post 05 Oct 2013, 15:41
BALTIC

During WINTER WAR NAVAL CAMPAIGN

30 November 1939
Finnish steamer Auvo (195 GTR) was captured and seized by the Soviet destroyer Grozyastchyi, with support of submarine chaser MO-111 (Finnish source wrongly said Steregushchyi). Soviet destroyer Gordyi sunk the small Finnish coast guard motorboat AV-45 at Lavansaari island (4 kia) that was occupied by Soviet forces.



Battles during the GREAT PATRIOTIC WAR:

Attention: the following list doesn't include ALL the small skirmish, many of them (especially the ones without damage or casualties) are not mentioned. Only the most relevant enemy sunk by minefields laid by soviet warships are reported, many are still unclear events of difficult attribution.

1941


22 June 1941
Soviet submarine chaser MO-238 was intercepted by a group of enemy motor torpedo boats and sunk by German MTB S-44

On the same day, German motor torpedo boat S-59 torpedoed and sunk Soviet merchant Gaysma (3077 GRT) (cargo of timber), while S-31 sunk merchant Liiza (782 GRT).


23 June 1941
German motor torpedo boat S-44 torpedoed and sunk Soviet merchant Alf (166 GRT) and S-43 sunk the floating lighthouse Khiumadal.


24 June 1941
Despite the order of self-destroy the submarine S-3 in Libau harbor. The commander tried to sail away from Libau, carrying also 100 people (the crew of the submarine and many workers of the harbor). The submarine sailed slowly and could not dive, and was attacked by the German MTBs S-60 and S-35 that missed the S-3 with torpedo. A gunfire battle erupted and the Germans had the advantage of being small and fast targets for the submarine, with higher rate of fire of their 20mm that outmatched the slower Soviet fire of 100mm and 45mm. The two S-60 and S-35 however were reached by soviet fire (with a total of 4 wia on S-35 ), but the damage on S-3 was heavier and was also hit with hand grenades and finally S-60 launched a depth charge directly in front of the submarine, sinking it. Most of the survivors were machine gunned in water (only 3, 9 or 20 according different sources, were later captured).


26 June 1941
German submarine U-149 was lightly damaged by soviet submarine chasers with depth chasers. Not enough to prevent a day later the torpedoing and sinking of soviet submarine M-99


27 June 1941
German motor torpedo boats attacked a group of soviet destroyers while it was on the duty of mine-laying. Storozhevoyi was hit by S-31 or S-59 and damaged by a torpedo but didn’t sunk (84 kia). It was believed that the attacker was a submarine. That night was also lost the soviet MTB TK-47(old name TK-163) damaged and captured by the German S-35. Soviet destroyer Stoikyi reported to have fired at MTBs the day 26 and 29, while the 27 was subjected to another attack but could not fire against the attacking MTBs.
Image

Storozhevoyi was the largest Soviet warships ever hit by German MTB.
Despite the huge damages, the ship showed great resistance and didn't sunk. The ship was even repaired and returned in service in 1943 with a new forward turret.
Image

Photo of the repaired destroyer.


On the mines laid by soviet destroyers can be recognized some victories:
Mines laid by destroyers Serdityi, Stoikyi and Storozhevoyi in Irben straits between 24 and 25 June will sunk on night of 26/27 June the German motor torpedo boat S-43
Mines laid by destroyers Serdityi, Stoikyi, Storozhevoyi, Silnyi, Strashnyi, Smetlivyi and Grozyashchyi between 26 and 27 June will sunk the German motor torpedo boat S-106 on the same night.

Sweeping such mines will cause the loss of:
Between 10 and 11 July 1941 : Sinking of minesweeper M-201. While M-23 was damaged and grounded, later recovered.
1 October 1941 : Sinking of auxiliary minesweeper R-205 (later raised and recovered).


Other heavy minelaying operations will involve the soviet minelayer Marti that laid many mines together the auxiliary minelayer Uragan.
On such mines are known to have been sunk:
1 October 1941 : sunk German submarine chaser UJ-117 close Hanko
11 June 1942 : sunk German support ship MRS-11 Osnabruck close Tallin.
Image

Design of the Marti from warshipsww2.eu. It was the largest and most powerful soviet minelayer.


However the most lucky ship was surely the Fugas-class minesweeper Tszcz-204 Fugas.
Between 22 and 23 June 1941 she laid alone the large number of 206 mines close Libau.
Sometimes some of her victories are questioned, because also German motor torpedo boats laid 30 mines in a closer point.
The often assigned to Tszcz-204 victory, the sinking of the German minesweeper M-3134 on 1 July 1941 was probably caused by such German mines.
These other victories are instead caused by the soviet ones:
German submarine chaser UJ-113 on 10/July.
German patrol ship V-309 Martin Donandt on 28/October.
German minesweeper M-1708 Aldebaran on 31/October.
German minesweeper M-1706 Gertrude on 22/November.
Still of uncertain cause was the sinking of:
Auxiliary ship Mosel (796 GRT) on 26 September.
German merchant Leontes (338 GRT) on 27 September
An ex-Latvian floating crane sunk while attempting to recover the Mosel, on 1 October.
German merchant Frauenburg (2111 GRT) on 7 November.

Sadly the same Tszcz-204 will sunk on mines in 1942.


2 July 1941
Finnish submarine Saukko receive slight damage after depth charging of submarine chasers after a failed attempt to attack Someri harbor. Unclear the attacker (soviet data for 1941 lacking, possibly small MO-4 class submarine chasers).


3 July 1941
Finnish submarine Vesikko receive slight damage after depth charging of submarine chasers after sinking merchant Vyborg (only merchant ship sunk by Finnish sub.). Unclear the attacker (soviet data for 1941 lacking, possibly small MO-4 class submarine chasers)


6 July 1941
Battle of Kolka
While the Soviet destroyer Serdityi and Silnyi were laying mines, they spotted a group of ships: the German support-ship MRS-11/Osnabruck and the minesweepers M-31. The destroyers attacked the enemy, Silnyi received a direct hit of a shell of 105mm fired by the minesweeper M-31 causing moderate damage and a little fire (casualties were 4 kia and 7 wia), the unit stopped the action after having fired 33 shells of 130mm. However Serdityi kept fighting, she fired 115 shells of 130mm: some sources claim that MRS-11 received light/splinter damages due near misses. However other German sources MRS-11 say wasn’t damaged.
The first Soviet destroyer engagement was fought at great distance, this caused the enemy to escape without real damages.

Photo from warshipsww2.eu
Image
Silnyi



10 July 1941
German motor torpedo boats S-26 and S-28 attacked and finished with torpedo the already heavily damaged and abandoned (after mine hit) Soviet merchant Rasma (3204 GRT). Ship had cargo of flour and grain.

12-18 July 1941
Campaign of Gulf of Riga
While German forces started their advance to the Baltic Countries, Vice-Admiral Drodz organized an offensive of surface ships against the barges, ferries and transports that had infiltrated into the Riga Gulf. A number of attacks were carried by motor torpedo boats, aircrafts and destroyers. The first Soviet MTBs attack of the conflict was carried by TK-17, TK-87, TK-73 and TK-93 on day 13 July. They attacked a convoy formed by the gunboat SAT-3 August, LAT-21 Gretchen and LAT-23 Deutschland , the command unit Feyya and a number of barges and tugs and other ships, escorted also by minesweepers M-251, R-28, R-29, R-168, R-169, R-170 and MTBs S-54 and S-58 (then joined by S-47 and S-57). Despite their torpedoes missed the targets, the gunboat SAT-3 August was damaged (struck by 60 hits of machine guns) and were damaged too by gunfire the barges B-1P, B-2P and Eemlan. Air raids were more successful, sinking the landing unit Deutschland (not the LAT) and causing damages to the tugs R.18 and D.118, the barges A-279, A-291, S-289, and the minesweeper R-169 and MTB S-58 (with a wia). Also the assault boat UK.126 suffered underwater damage. Human losses on ferries, tugs and transport and barges weren’t heavy (5 kia, 27 wia of them five seriously, all caused by air attacks). Other damages (and light casualties ) were inflicted by air attacks to other convoys the next days. In the end the Soviet claimed to have sunk , destroyed or damaged 37 targets and Germans confirm to have lost 1, other 2 badly damaged and 23 with light damages (a total of 26).During the last engagement on 18 July the Soviet MTB TK-123 was sunk by aircrafts (not minesweepers as sometimes reported). The destroyer Strashnyi carried the first and only torpedo attack (by destroyer) in Baltic, launching 2 torpedoes without hits (she was then damaged by mine, 11kia and 7 wia, German claims of MTBs successful attack aren’t correct), while destroyer Steregushchyi claimed to have managed to sunk 5 barges and 2 escort units (later it was claimed only 2 barges sunk and 2 damaged). This last action had caused only light damages to the minesweepers R-30 and R-31 (was also damaged the R-168, by aircraft, with 3 wia) (another report give details that the two damaged R boats did not received hits but indirect damage due shells explosion’s effects and some sailors wounded).
The largest naval operation in 1941 was done in Gulf of Riga. Despite the results were poor, the German operations were delayed, it was also the first battle damages caused by Soviet Motor torpedo boats and destroyer.
Image

Painting of the MTBs attack.


19 July 1941
The soviet minesweeper Tszcz-202 Buy damaged the Finnish motor torpedo boat Vinha that had to be towed away by the Raju while the Syoksy launched torpedo with no effect. There were no casualties.


20 July 1941
Destroyers Yakov Sverdlov, Volodorskyi and minesweeper Tszcz-207 Shpil heavily engaged against German units, the Sverdlov fired against S-boats but they believed it was coastal artillery fire. Then other soviet ships rushed to the scene including MO and TK, but the only ongoing engagement was still the Yakov Sverdlov that chased the s-boats and fired against a group of r-boats. There was no report of damage.


21 July 1941
German submarine U-140 was damaged by depth charges of soviet submarine chasers after having torpedoed and sunk the soviet submarine M-94.


22 July 1941
Soviet motor torpedo boat TK-71 and the icebreaker Lachplesis (580 GTR) were sunk by German MTBs. (The tug was hit but actually sunk 7 days later)



26 July 1941
Battle of Bengtskar
During the Soviet failed attempt to land on Bengskar the soviet submarine chaser MO-306 (previously known as PK-238) was sunk by the Finnish gunboat Uusimaa. (other Soviet units involved were MO-238, MO-311 and MO-312, and on Finnish side the gunboats Hamenmaa and patrol boat VMV-13). The same Finnish gunboat Uusimaa and the coastal battleship Ilmarinen (that together the sister ship Vainamoinen had started to sail to the island, fearing the action of Soviet destroyers, that never occurred) were lightly damaged by aircrafts with 2 kia and 13 wia. Soviet crewmembers of MO-306 suffered 16 pow. Also MO-237 and MO-236 bombed the island.


26 July 1941
During a short engagement, Soviet MTBs boat try to attack German R-boats, after that an air raid had sunk R-169 (11 kia, 12 wia) and damaged R-53 and R-63, but they’re repelled by R-170 and R-168 with no damage inflicted on both sides.


1 August 1941
Soviet destroyer Silnyi, reported to have fought a short gun fight that was possibly an inconclusive engagement. There are not clear data about the identity of the ship that was probably left unharmed. Soviet MTBs reported a clash with German RA minesweeping boats. It’s reported TK-74 managed to sunk RA-55, while TK-84 sunk the RA-53 and the TK-122 was sunk by the German boats (there are different opinion about this clash, the fate of the RA boats it’s not clear except they were lost in summer 1941 officially due mines, being ex-dutch units, sadly lacks proper German documents about their activity). Another report claim of 4 TK class that attacked the German MRS-12 with minesweepers M-3, M-4, M-8, M-7 and M-20 but the only damage was on TK-103 (light), the two engagement however were probably not related.


5 August 1941
Finnish submarine Vesihiisi was damaged with depth charges by auxiliary minesweeper Menzhinskyi and submarine chasers MO-212 and MO-142. The Menzhinskyi is the larger soviet warship (an ex-civilian ship) confirmed to have hit with depth charges a submarine in Baltic.


8 August 1941
Failed attempt of Finnish MTBs and patrols to attack evacuation convoys from Hanko. Soviet patrol boat’s MO-211 and MO-142 fire was too inconclusive. On the way back the all the Finnish patrol boat that took part at the failed attack VMV-11 and VMV-17 (2 kia, 2 wia) and MTBs Syoksy and Nuoli were damaged by Soviet aircraft


12 August 1941
A clash on Peipus Lake was fought by Soviet ships (gunboat Embach and two KM-boats) and German patrols. No damages were reported but there are few details about this engagement. It's relevant for being the first of the two clashes on Peipus Lake, with unclear results.


12 August 1941
A clash was fought between the German MTBs S-26, S-28, S-39 and S-40 with the Soviet small minesweeper Tszcz-41. The soviet unit was sunk while the S-39 was damaged.


17 August 1941
During the Battle of Narva, the soviet gunship Krasnoye Znamya bombed German land forces and during this operations was reported to have destroyed some pontoons used by Germans to cross the river. Light damages was then suffered by the ship from German Ju-88 aircrafts.


19 August 1941
German motor torpedo boat S-58 torpedoed and sunk Soviet icebreaker Merikaru (178 GRT).


21 August 1941
Soviet destroyers Artem and Surovyi intercepted and attacked a small German convoy. There was an heavy gunfire battle, both the destroyers suffered light damages, but Artem (that had 2 wia) fired 110 shells of 102mm and Surovyi fired 145 shells of 130mm in just half hour. It was reported that both the destroyers at least damaged two enemy merchants. Actually they’ve attacked the gunboat (ex-cargo armed) Ost, that was escorting the ships Maggie (a steamer), Olga, six ferries and two motorboat. During the fight the SAT-1 Ost was damaged and run aground (1 kia and 3 wia) but at that point the Soviet destroyers left.
The last engagement that saw action of Soviet destroyers in Baltic, and the one that resulted in the heaviest damage to an enemy ship, the gunboat Ost was forced to run aground by the destroyer action (will be later recovered).
Photo from warshipsww2.eu:
Image
Artem
The stern defense and the temporary sacrifice of the German gunboat prevented further damages, the only human loss occurred during the ship's evacuation, while the Soviet destroyers were still keeping on firing.
The Artem was a veteran of the Russian Civil War, having fought under Bolshevik flag (and known at the time as "Azard"). During that war she has been responsible for the sinking of the British submarine L-55 with gunfire (the Royal Navy has been involved in support of the counter-revolutionary forces)
Image

Photo of the SAT-1 Ost. She was armed with a main gun of 150mm and smaller weapons.


24 August 1941
Soviet cruiser Kirov and the leader destroyer Leningrad made successful (even if moderate) bombing against German forces near Ygisu Cape, an ex-soviet riverine ferry (steamer) that had been captured by German land forces was reported to be shelled and destroyed on river Keila. Possibly hit by Leningrad. There are not many data by Germans (involving Wermacht and not Kriegsmarine).


27 August 1941
Soviet MTB TK-57 (later renamed TK-94) with three other MTBs attacked the motorboats Adele and Diete Korner, both run aground during the attack and were strafed. TK-94 starts her career as famous unit, involved in many skirmish and battles.


28 August 1941
Soviet gunboats BK-213 and BK-214 attacked close to Finnish shore a small convoys of unarmed Finnish barges with a series of ramming attacks (to not alert enemy patrols with gunfire), inflicting a number of losses, with 2 pontoon ferries sunk and other 2 damaged beyond repair and 4 motorboat sunk (motorboats were towing the pontoons). At the time of the attack the units were not carrying troops and the casualties were only of 3 kia and 4 wia. Finnish sources confirm these losses (Soviet had actually claimed a total amount of 10 targets sunk or destroyed)



27-28 August 1941
Evacuation of Tallin
(Naval engagement):
During the Naval evacuation of Tallin, the Soviet Navy had terrible losses and so the people carried on transport and warships when the fleet fall in mines barrages and was subjected to air raid (the total losses are believed to be an estimate of 8,000 to 12,000 soldier and civilians killed: the long list of victims include: 13 military vessels, 30 other vessels. (Other source made lists that include up to 16 military and 25-34 while others reach 22 military and 42 naval vessels). There were few surface attacks, the only losses were caused by Finnish units when the Soviet schooner Atta was torpedoed by VMV-17 (patrol boat at the time armed with torpedo launchers) and tugs I-18 and Paldiski were captured by Finnish patrol boats. German MTBs had less success because S-26, S-27, S-39, S-40 and S-41 were repulsed by Soviet Destroyers fire (including the fire of the leader destroyer Leningrad and Minsk) (there is not a detailed German account of the engagement, and no knowledge if they suffered some light damages).
Despite the huge human and material losses of the entire operation, the effective surface naval engagement is disputed because the naval warships prevented damage from the German surface attacks (Finnish proved to be more successful, but obtained only sinking on small targets).


2 September 1941
Soviet MTB TK-57 (later renamed TK-94) and other units including by TK-67 and TK-154 attacked the minesweepers M-3 and M-20 that suffered light damage by gunfire according one source, but denied by other.

On the same day, the Finnish MTB Syoksy sunk the Soviet merchant Meero (1866 GRT).



13 September 1941
One of the most important soviet naval success occurred during the enemy Operation Nordwind. A large enemy operation that involved the battleship Tirpitz and the light cruisers Emden, Köln, e Leipzig and other smaller warships: the main purpose was to distract the Soviet Navy from the German landings on Estonian islands and at the same time it was expected that Soviet Navy attempted to make flee the main warships to neutral Sweden. Actually the Soviet Navy had never such plans and they neither were aware of the large naval enemy operations (nor could have there been intention to face the Germans in open-battle, especially after the losses suffered on mines and the German air superiority). The Finnish Navy took part into this coordinated operation, involving the coastal battleship Ilmarinen: such warship struck mines laid by the Soviet torpedo boats Tsiklon and Sneg and the minesweeper Tszcz-201 Zaryad, sinking with the loss of 271 lives.
It was the greatest naval loss for Finland: the impact of such sinking remarked what was already clear, in Baltic sea and Gulf of Finland there was no space for large operations of warships due the danger of mines (have to be remembered that all the three ships, Tsiklon, Sneg and Zaryad, will be later sunk on enemy mines in different operations).
Designs and photo from warshipsww.2
Image

(photo of sister-ship Uragan)
the soviet torpedo boats were never used for the original role due poor quality and stability during bad weather. Still they provided the Soviet Navy with one of their most important victories as mine-layers.
Image

The Finnish designed such coastal battleships (or coastal defense ships) as other Nordic countries: smaller and stubby warships that could easily navigate and hide within the complicated mass of islands and inlets found in the Finnish Archipelago, but armed with 254mm main guns: more than enough to deal with the larger soviet cruisers of the time (Kirov and Maxim Gorkyi, in Baltic sea).


14 September 1941
Soviet MTB TK-104 (other name TK-65) sunk with torpedo the German minesweeper M-1707 Lunenberg already abandoned by crew after both mine and coastal artillery hits.


22 September 1941
Finnish MTB Syoksy torpedoed and sunk the Soviet auxiliary minesweeper Sergey Kirov.


23 September 1941
During a bloody clash the Soviet MTB n°12 sunk with torpedo the German patrol ship V-308 Oscar Neynaber but was later sunk with gunfire by V-309, while the other MTB that took part at the attack, n°22, managed to escape. It was the first successful sinking of a soviet Motor torpedo boat in Baltic with the subsequent loss of the same unit due gunfire action. It was also an early use of the D-3 class that proved to be quite successful but for some years the smaller G-5 were mainly used by Soviet navy in Baltic.


25 September 1941
During the night the German minelayer Konigin Luise was sunk by soviet mines in front of Hanko. The ship sunk on minefields laid by soviet submarine chasers of MO-4 class (of the three possible fields, the first was laid by MO-206, MO-210, MO-211, MO-227 and MO-252, the second and the third ones were laid by MO-206, MO-210, MO-211 and MO-232).
Image

Design of the minelayer sunk from warshipsww2.eu.


27 September 1941
Soviet MTBs TK-67, TK-83, TK-111, TK-164 carry the only attack of the war against enemy cruiser: the light Emden and Leipzig. During the assault the TK-83 was sunk by enemy fire and the Soviet had claimed to have hit the Leipzing. At the time the cruiser was claimed to be sunk, Germans deny every kind of damage. (after this the Leipzig was reported to have been put on repair, until June 1942, but Germans claim it wasn’t due battle damages). The Soviet MTB commander was awarded as Hero of the SU.
The first and only attempt of a Soviet motor torpedo boat to attack enemy cruisers.


30 September 1941
Finnish MTBs Nuoli and Sisu attacked the Suursaari harbor and of the four launched torpedoes, three of them exploded close the Soviet submarine L-3 that was lightly damaged. The submarine had opened fire as soon as the MTBs were spotted and a single shell of 45mm had hit the fourth torpedo after it had been launched, without causing the detonation but stopping its run (an incredibly lucky event for the submarine, and unlucky for the MTBs that lost the chance to sunk what proved to be the best ever Soviet submarine during the war). The torpedo was later recovered intact by the Soviets. (Finnish sources claimed to have sunk a Fugas-class minesweeper, but actually none of them was sunk during the attack or by other kind weapon than enemy mines in Baltic Sea during the whole conflict).
Last edited by 1redItalian on 29 Aug 2014, 10:25, edited 51 times in total.
Reason: minor corrections
Soviet cogitations: 150
Defected to the U.S.S.R.: 20 Feb 2010, 11:57
Resident Admiral
Post 09 Oct 2013, 15:54
1942

June 1942
Not less than six different skirmishes were fought between Finnish patrol boats and motor torpedo boats against soviet light crafts in June 1942: no unit was damaged and there were no casualties on both sides.


8 - 11 July 1942
Battle of Someri Island.
During the bloody failed Soviet attempt to land on the island there were a number of naval actions.
The total report of losses has been disputed for years by Soviets and Finnish/Germans sources.
Checking the actual losses, Soviets lost the motor torpedo boats TK-121, TK-71, TK-22 (later shelled by Finnish gunboats), TK-31 due Finnish coastal artillery while TK-131, TK-152, TK-62 were damaged, in addition to the submarine chaser MO-306 (alternate name MO-510, it was not the same unit sunk during the Battle of Bengtskar despite having the same name, reported heavy damages and lost due it by some sources, but photographical evidence show her destroyed at Someri) that was destroyed while MO-110 and MO-402 were damaged by the same artillery fire.
Probably were MO-103 and MO-213 that scored one hit and damaged the Finnish motor torpedo boat Nuoli (on patrol, not attacking soviets).
A naval clash with the Finnish gunboats Uusimaa and Hameenmaa resulted with the first one sinking the TK-113 while the TK-73 attempted and failed to attack the Hameenmaa: the two Finnish gunboats kept on shelling the soviet group and were quickly sunk TK-123 and TK-83 (these last ones have not to be confused with the homonymic units lost in 1941).
The German minesweeper M-17, the Finnish gunboat Turunmaa and Soviet gunboat Kama joined the battle. Soviet aircrafts counter-attacked and managed to damage M-17(4 wia), Uusimaa ( 4 kia and 9 wia due Pe-2 bombers ) and Turunmaa (2 kia and 8 wia, but these casualties were due sudden explosion during the battle).
The Kama shelled the island (she was claimed sunk by Finnish aircrafts but actually got no battle damage).
Report of a possibly short clash of Kama against Hameenmaa are not clear, as if her arrival may have caused a Finnish retreat (in addition to battle damages and lack of ammunitions).
Further Soviet units were moved to battle, including the torpedo boat Burya with support of the minesweepers Tszcz-205 Gafel and Tszcz-207 Shpil, balanced by the arrival of the Finnish minelayers Riilahti and Routsinsalmi and the German auxiliary gunboat SAT-1 Ost, the tender Nettelbek and minesweeper M-19 (to replace the damaged M-17), despite the soviet units did some bombings, there are few detail about a rushed exchange of fire between the larger units involved into the last part of this battle: no actual damages on both sides however was reported.
On Nettelbek there were 2 wia, but after another soviet air raid.
There is also confusion among some German data because others reports that the first minesweeper damaged was M-18 (not M-17), and the second one that replaced her was M-37 (not M-19), but these are wrong data.
The battle showed in the most bloody way how using motor torpedo boats for landing troops without direct cover was an heavy mistake.


13 August 1942
Short clash between soviet patrol boats and Finnish motor torpedo boat Vinha, Raju and Nuoli. One wounded on Finnish side.


15 August 1942
In Ladoga Lake.
The Italian motor torpedo boats MAS-528 and MAS-527 had a clash with Soviet gunboats Nora and Selemdzha and submarine chasers MO-199, MO-202 and MO-209. Italians torpedoes missed the gunboat Selemdzha that was however hit (one wia) and lightly damaged by gunfire of MAS-527 that took itself a direct hit from return fire with more heavy damages.
It was the only Italian attack on Ladoga with some little result: other MAS attacks on 28 August and 29 September saw reaction fire from gunboat Sheksna during first engagement and from gunboat Lachta on second engagement.
Image

Photo of the Selemdzha: italians claimed to have sunk a "Bira class" gunboat during the attack, but the torpedo exploded on the seabed (causing the confusion).


25 August 1942
In Ladoga Lake.
Finnish coast guard motorboat E-32 was captured by submarine chasers MO-206, MO-213 and MO-215 after a short gunfire. 2 pow.


26 August 1942
Soviet motor torpedo boat TK-152 torpedoed and sunk the German submarine chaser UJ-1216 Star XXII (have to be said that the German sub. chasers were different from the Soviet ones: the first were almost ever larger ex-fishing ship converted and armed also with 88mm gun, the Soviet units were faster and smaller boats, often used as patrol boats.).


1 September 1942
In Ladoga Lake.
Soviet submarine chasers MO-201, MO-213 and MO-215 met the Italian motor torpedo boat MAS-529: during a short artillery engagement the Italian boat was damaged and escaped, the three soviet boats were later attacked by Finnish and German aircrafts and suffered light damages with 6 wounded.
Image

MO-215 has been preserved.


4 September 1942
In Onega Lake.
Even if it was an inconclusive engagement, it's worth to be mentioned for being the main engagement on Onega Lake: Finnish gunboats Karkhumaki, Ilmari and patrol boat VTV-1 reported to have been subjected to fire from enemy ship and that despite the exchange of fire no damage was inflicted or suffered. A second clash was reported later, again without result. Soviets claim that first unit met was the gunboat KL-12, and then rushed to battle BKA-22, BKA-41, KL-11 and KL-15. The largest and main engagement on Onega Lake of the war ended with no damage on both sides.


10 October 1942
In Ladoga Lake.
During a first failed attempt (due bad weather) for the German flotilla of armed barges to attack Suho, while sailing to return at the base they met and sunk with gunfire the Soviet submarine chaser MO-175 (9 pow). It was the only unit directly sunk in surface engagement in Ladoga Lake.


22 October 1942
Battle of Suho Island
In Ladoga Lake.
After the poor performance of Axis forces in Ladoga Lake, the Germans (at the second attempt after 10 October) realized their landing attack against the small Suho island located in south of Ladoga Lake: they had 7 infantry boats and 11 escort artillery ferries (heavy SF-11, SF-13, SF-15, SF-17, SF-21, SF-23, SF-25 and the light SF-12, SF-13, SF-22 and SF-26), the transport ferries (T-2, T-4 and T-6), a command-ferry and an hospital ferry and the Italian motor torpedo boat MAS-528, the landing party was formed by 70 soldiers. Soviet little minesweeper Tszcz-100 (an ex-Finnish unit) spotted the enemy and attacked them with support of submarine chaser MO-171. German assault didn’t turn well, the damage inflicted to the Soviets was low and over-claimed of Germans (the garrison of soviet soldiers was neither pushed away by their positions or “destroyed” also the Germans retreated before fully destroying the lighthouse and 1 of the 3 guns of 100mm wasn’t destroyed). Germans were poorly prepared about the island geography and a number of units run aground: they lost the heavy ferries SF-13 and SF-21 (this second one was directly hit by the survived 100mm coastal gun) light artillery ferries SF-12 and SF-26 and infantry boat I-6 (lost because towed to SF-21) while SF-22 was damaged too by the survived 100mm gun. Their total losses were of 18 kia, 57 wia and 5 mia (found dead by Soviets on the Island, also 2 wia were reported death later, rising the kia count to 25). Soviet ground forces lost 6 kia, 23 wia and 5 pow. Soviet claimed to have shot down at least 15 aircrafts, including one by the MO-171 (German aircraft losses were surely less, with only 4 lost that month in and around the Ladoga). It’s highly probable that Soviets shelled the ferries struck on rocks with aircraft and with naval fire ( Tszcz-100 alone reported to have used 400 shells). Further Soviet reinforcement were MO-201, MO-205 and MO-206 plus gunboats Bira and Selemdzha and others. During a short chasing of the retreating enemy group, both the gunboats received light damage (2 wia on Selemdzha), while another wia was reported on MO-198. Germans confirmed to have received splinter damages during this phase on multiple units, but there is not a list of units that suffered such damage.
Germans paid an high price for their raid, the objectives were neither fully accomplished (and the damage done was temporary): most important of all the battle gifted the Soviet Navy a conclusive victory over the enemy into this small naval theater of Ladoga Lake (no more Axis naval operations will later carried on in 1943).
Image

Painting of Selemdhza.
Image

Photo of two of the enemy ferry barges abandoned by enemy: there are poor details if they were also shelled by land forces/aircrafts/soviet boats during or before their abandoning but they are clearly in bad state in the photo. Soviets will recover only one of the three ferries captured, renaming it DB-51


5 November 1942
Soviet submarine ShCh-305 was rammed and sunk on surface by Finnish submarine Vetehinen. It was one of the few confirmed submarine vs submarine ramming sinking in WW2. ShCh-305 had previously scored no victories and Vetehinen scored only this one during the conflict.


18 November 1942
Finnish motor torpedo boats gained what was possibly the best Finnish success against a Soviet warship, when the Syoksy torpedoed and sunk the heavily armed gunship Krasnoye Znamya (other MTBs in the action were Vinha and Vihuri) in Lavensaari harbour ( 64 kia) (even if the ship will be later raised, repaired and returned operative).
It was the largest soviet military ship to be sunk by motor torpedo boat in the war, after her there was only a less armed gunship in Black Sea.
Image

The temporary loss of the armed gunship still represented the worse blow caused by an enemy MTB action during the conflict.
Soviet cogitations: 150
Defected to the U.S.S.R.: 20 Feb 2010, 11:57
Resident Admiral
Post 15 Oct 2013, 17:37
1943

22 May 1943
German MFP F-189, F-188 and F-191 attacked with gunfire the submarine ShCh-408 that was claimed sunk with at least 6 direct hits. One German barge was damaged in action. However is more probable that submarine dived and was later sunk by Finnish ships with depth charges some days later.
Image

Soviet painting of the last stand of the submarine: actually it's seems that ShCh-408 survived the engagement on 22 May (and the damaging of an enemy ship is the only soviet victory achieved by a submarine in 1943 in Baltic), to be then subjected to depth charges and bombing.
The claim of the minelayer Riilahti is probably incorrect because further attacks were done: the submarine could have been sunk on 23 May (by other Finnish units, including minelayer Routsinsalmi), 24 May (further air attack), 25 May (German patrol ships with depth charges) or by mine during unclear day. Aircrafts were dispatched to try to save the submarine, but after losses (4 aircrafts lost in action), further attempts were not risked.
The submarine's crew was honored for the behavior in fight.



23 May 1943
Battle of Seivasto
The two submarine chasers MO-303 and MO-207 were attacked by a large group of Finnish crafts: the patrol boats VMV-8, VMV-9, VMV-10, VMV-11, VMV-17, and the motor torpedo boats Hurja-1, Hurja-2, Hurja-3, Hurja-4 and Hurja-5 (MTBs however did not took part at the battle). The clash was bloody and brutal with heroism on both sides, the two Soviet crafts managed fight back the numerically superior enemy despite being disadvantaged. VMV-17 was damaged with 2 kia and 1 wia (other sources report 1 kia and 1 wia) and had to be towed away by VMV-10 while the Finnish group retreated (other two VMV suffered damages with other 3 wia according a Finnish source, other sources however claim no other VMV were damaged and there were no other casualties apart the ones on VMV-17). Both MO-207 and MO-303 returned victoriously at the base, 2 men kia (including the captain of MO-207) and 3 wia on the first ship that was damaged , also a third unit (MO-124) shortly took part at the engagement at the end. Soviets had claimed to have sunk the motor torpedo boat Raju, but according Finnish she was lost because of an underwater obstacle that month. Also Finnish claimed to have sunk two soviets boat, but none was lost.
Image

Soviet painting of the battle, with the MTB Raju claimed sunk in the engagement. Actually now it's clear how both sides had no units lost, however the soviets managed to break a difficult situation and escape free (after having damaged the enemy flag-ship), scoring a moral success.


31 May 1943
Soviet submarine chasers MO-101, MO-121, MO-122 and MO-302 fought against Finnish MTBs Hyrksy, Hirmu, Jyske and Vihuri and VMV-8, VMV-9, VMV-10 and VMV-11 patrols, during the fight the Finnish boats Jyske and Vihuri collided and suffered some damage while Hyrsky was damaged by Soviet fire.


2 June 1943
Soviets submarine chasers MO-413, MO-104, MO-105, MO-302, MO-101 and patrol boats SKA-172 and SKA-182 fought against a number of Finnish VMV patrols, and during the fight the MO-413 was encircled by VMV patrols and was saved by the counter-attack of other units. One soviet sailor was wounded. There was then also enemy coastal fire on the Soviet ships, but with no damage inflicted.


19 August 1943
Soviet sub. chasers MO-124 and MO-203 fought against enemy boats and were laid smoke screens and launched depth charges to create confusion. Soviet suffered 2 wia and light splinter damage. Finnish had VMV-8, VMV-9, VMV-11, VMV-17 , Vasama, and minesweeper boat AV-138


23 August 1943
Two Soviet MTBs attacked the Finnish minelayer Riilahti and the patrol VMV-1: the TK-94 sunk with torpedo the Riilahti (24 kia), scoring a strategic success on the Finnish mine-laying abilities.
Image

Photo of the minelayer: her sinking was an effective revenge for the sinking of Krasnoye Znamya because helped to reduce the Axis minelayer's ability in Baltic.


30 August 1943
Battle for Kronstadt channel
Soviet minesweeper n°605 (of KM-class) clashed against a group of German motor-cutters, they were on mission to lay mines deep inside the Kronstadt channel. The soviet unit was sunk after an hard battle with close-range fire and hand-grenades launch, but 3 of the motor-cutters were sunk and at least other two were damaged. 3 soviet sailors (including the commander) were killed and 6 saved. The enemy due the heavy losses had to abandon the operations that was never attempted again. The soviets actually had not realized the importance of the enemy raid and the losses of the enemy (only 2 cutters were claimed as damaged), with her sacrifice, the small ship had protected the important channel.
Image

A boat of the class.
The sacrifice and the last stand of the crew of this small guard-boat prevented the enemy to accomplish what could have been a very dangerous mission. It was only years later that soviets found some remains of the cutters and they're kept into a museum and claimed to have been italian assault crafts (they never operated in such area).


6 September 1943
German minesweeper M-16 and gunboats SAT-5 Robert Muller and SAT-15 Polaris were attacked by TK-14, TK-44, TK-94 and later by TK-76. There was no torpedo hits, but SAT-15 Polaris was damaged by gunfire with 2 wia (or 4 wia according other sources) including the commander.


7 September 1943
Soviet submarine chasers MO-207 and MO-124 claimed to have fought against a group of 4 enemy MTBs and that one was damaged by MO-207. This soviet unit received 4 hits and had 1 kia and 1 wia.
Later Finnish boats attacked a soviet convoy and sunk the tug K-12 and barge LPT-11.
Finnish boats were Taisto, Tuima, Tuuli and Jyske and they did not reported of own damage.
This was possibly one of the most effective raids of Finnish MTBs that attempted to cut the naval supply line for Laavensaari island: such raids however did not caused significant damage to the garrison.


14 September 1943
Soviet motor torpedo boat TK-95 sunk by German minesweepers after a failed attack. 3 Pow


21 October 1943
Finnish MTBs Tuisku, Tuuli, Tarmo, Jylhä, Jymy, Jyry and Jyske carried some inconclusive torpedo attacks, but also engaged in gunfire with Soviet patrol boats. The only damage was the one on Tarmo and Jyry that collided and were damaged by accident.


30 October 1943
A clash between soviet MTBs and German minesweepers left the M-16 slightly damaged by soviet gunfire (one single bullet hit). In the same engagement were sunk TK-75, TK-134 and damaged TK-85 due the larger minesweepers's firepower.


2 November 1943
Soviet MTBs attacked 8 enemy ships that approached to minesweepers. In two rounds of battles against German minesweepers were sunk the TK-146 and TK-106. Both of them were of D-3 class and not of the previously more used G-5.
Soviet cogitations: 150
Defected to the U.S.S.R.: 20 Feb 2010, 11:57
Resident Admiral
Post 24 Oct 2013, 15:20
1944


14 May 1944
Soviet submarine chaser MO-122 was sunk by German motor torpedo boats (9 killed). Other Soviet units involved were MO-401, MO-413, MO-213 and MO-202 that fought against S-132, S-79, S-91, S-135 and S-76. Germans had 2 wounded on S-91.


16 May 1944
Soviet submarine chasers MO-101 and MO-313 had a clash with 4 enemy boats then joined by other 2.
MO-313 was damaged with 5 wounded and claimed to have damaged an enemy boat.
Later another group of Soviet units (MO-104, MO-105, MO-107, MO-207) clashed against them (two groups of German boats, S-90, S-39, S-97, S-114 and then S-132, S-79, S-135 and S-91). No damage was actually caused to the enemy, only an accidental explosion on S-132 with one wia.


26 May 1944
Soviet submarine chasers MO-302, MO-104 and MO-313 fought against german boats. The MO-302 was damaged with the death of the commander (Lt.Sidorenko) other two sailors and other 11 crewmembers were wounded but the German group of S-97, S-114, S-91 and S-135 suffered a direct hit on the first unit (3 killed and 1 wounded ) and heavy damages, while light damage was suffered on the second unit (had another wounded).
Image

Painting of MO-302 from shipandship.chat.ru


30 May 1944
Soviet motor torpedo boat TK-94 and other units attacked a group of enemy boats, that included 4 minesweepers lead by M-37. Germans suffered 1 wounded on an unit. This was the Seventh scored success of TK-94 that was possibly the most successful Soviet surface unit during the war by sheer amount of numbers (1 individual kill with torpedo, 6 shared damage with gunfire).


5 June 1944
A successful assault against German minesweepers by soviet motor torpedo boats: M-37 was torpedoed and sunk, but also TK-46 sunk by gunfire (2 KIA, 8 POW) other units taking part at the attack were TK-15, TK-35, TK-45, TK-55 and TK-65 that can claim the shared victory.
Image

German minesweepers of "1935" series (as M-37) and " 1940" series were well armed ships that could deal with smaller attacking crafts: Soviet Navy lost a number of MTBs against them and managed to sunk 3 of these ships (two in Arctic and the M-37 in Baltic Sea).


13 June 1944
On Lake Peipus.
Soviet gunboats BK-213 and BK-322 attacked a group of 4 German auxiliary minesweepers. During the fight the KM-19 was damaged by a shell of 45mm with 3 wounded and was forced to escape with other two units but KM-08 was left behind and was hits many times and rammed until stranding on rocks at the shore and being lost, of the German crew of 11, only 2 managed to hide themselves and were later rescued by Germans, BK-213 captured 4 sailors (2 died later), she was lightly damaged with 2 wounded (BK-213 was also responsible of the ramming).
Image

Painting of the ramming. This small victory was still locally important: great was the moral value being the Peipus Lake the same one that saw the historical Battle of the Ice that saw the Teutonic Order defeated by Alexander Nevsky.
It's also interesting that BK-213 was the same unit involved in 1941 in another successful ramming attack against a group of Finnish barges and motorboats.


17 June 1944
Soviet motor torpedo boat TK-51 was damaged and captured by Finnish patrols VMV-13 and VMV-16 and motor torpedo boat Vasama (she suffered 1 wounded, but maybe due friendly fire from VMV).


20 June 1944
I Battle of Nerva Island
The Germans attempted the first of their two offensive operations using larger warships into the Gulf of Finland against Soviet units.
They dispatched the two large Elbing-class torpedo boat (named by Germans as "fleet torpedo boat", comparable to the British destroyers) T-30 and T-31 in the “Operation Drosselfang” with the purpose of sweeping and destroying as many as possible soviet small units around Nerva Island.
The soviet had 14 motor torpedo boats, 10 patrols (of MO-4 submarine chasers class) and 4 small gunboats operative but no larger units close the island. The attack of the two torpedo boat only managed to cause light damages to the submarine chaser MO-106 (captain wounded) and on the two small gunboats MBK-503 and MBK-505.
At this point the Soviets realized that their motor torpedo boats were near important targets and all the units available were launched in waves.
The first attack had the TK-53, TK-63 and TK-153 repelled with damages (the heavier damage was on TK-63, that suffered 3 hits). A second attack was again a failure, with TK-101 and TK-103 lightly damaged, but finally the Soviets accomplished a third attack with a pincer movement: TK-37 and TK-60 both launched their torpedoes at the two sides of the torpedo boat T-31 that was torpedoed and sunk (76 KIA and 8 POW). The other torpedo boat T-30 was forced to retreat, she had received damages due machine-guns fire from the attacking motor torpedo boats and suffered one killed and 13 wounded. The fleet torpedo boat T-31 was the largest warship sunk in action without doubts by Soviet Navy during the war.
Even if this battle was small compared to the others fought by Allied navies, the Soviet Navy managed to score a local important victory.
Image

Painting of the Victory.
At least other two Elbing class fleet torpedo boat were lost due soviet action: one was sunk on mines laid by submarine L-3, another was sunk by soviet aircrafts).
Image

MBK gunboats were small, yet they managed to survive the German shelling done by more powerful warships.


30 June 1944
Soviet motor torpedo boats TK-43, TK-63 and TK-161 were sunk during an engagement with German minesweepers in two separate clashes. Is reported that some of the minesweepers suffered light damages in battle and also the Soviet TK-14 was damaged.


4-5 July 1944
Battle of Viipuri Bay.
While the Red Army was pressing on the offensive against the German and Finnish forces on the ground, a number of skirmish occurred in Viipuri bay. Many surface engagements were carried by Soviet TK and MO (including MO-104 and MO-105) boats that suffered 4 units damaged (1 killed and 17 wounded) but no torpedo hits was caused and Finnish reported of no damage due machine guns.
However the Soviet air force dominated the sky and Finnish units suffered a number of air attacks with support of coastal artillery of 85mm: the gunboats Hamenmaa, Uusimaa (this one received two direct hits by coastal artillery and also the captain was killed), Turnmaa (two hits caused by Il-2 aircraft) and the patrol boats VMV-10 and VMV-11 were damaged and forced to retreat (with a total count of 13 killed and 15 wounded) and the second day of operations also the gunboats Aunus and Viena were damaged with other 10 killed and 13 wounded (the first unit was the flag-ship and received 3 direct hits of 100kg bombs) (other Finnish units were VMV-5, VMV-14, VMV-15, VMV-16). German units (minesweepers and barges) rushed to help the Finnish and minesweeper M-15 was damaged by bomb.
Soviets successfully adopted air superiority to not risk losses in engagements (this was reasonable because the MO-4 class could not hope to face the Finnish gunboats).


15 July 1944
German submarine U-679 had a gunfire battle against the submarine chasers MO-104 and MO-105 and motor torpedo boats TK-47 and TK-57: during the engagement one torpedo of TK-57 barely missed the target and the U-679 was damaged by gunfire with five hits and 8 wounded. Germans wrongly claimed to have damaged a soviet unit, but none of them suffered damage (while it was the same submarine to be damaged).


16 July 1944
II Battle of Nerva Island
After the defeat during the I Battle of Nerva Island, the Germans attempted a second attack launching the “Operation Buckenwald”.
Germans sent the Elbing-class torpedo boat T-30, followed by the two smaller torpedo boats T-8 and T-10.
Once again their purpose was to clean the waters from soviet small boats causing as much damages as possible: the torpedo boats met the group of submarine chasers MO-121, MO-112 and the patrol boat SKA-69. MO-121 was damaged with 8 wia (two later died) and MO-112 received splinter damages but no target was sunk. Then there was the counter-attack of the Soviet torpedo boat Tucha and the minesweepers Tszcz-211 Rym and Tszcz-217 Kontr-Admiral Yurkovskiy.
It was the only clash between German and Soviet torpedo boats.
During the fight no hit was scored on both sides and the Germans were forced to retreat after engine failures on T-10 and gun failures on T-8.
Even if the engagement was inconclusive, once again the Germans failed to obtain the results hoped because they could cause only minimal damage


20 July 1944
Soviet submarine chaser MO-103 sunk with depth charges German submarine U-250
Image

It was the only confirmed sinking of enemy submarine with depth charges in Baltic (and according the modern evaluation, one of the two ones achieved in the whole conflict). The victory was very important because the submarine sunk in low waters and the captain was captured as POW.
Germans and Finnish attempted to prevent the recovery of the submarine (firing with long-range artillery and dispatching a group of motor torpedo boats to attempt the destruction of the wreck). Yet the Soviets managed to save the submarine and recovered an Enigma deciphering machine, secret documents and (most important of all) intact German acoustic torpedoes (GNAT).
Image

Photo of the raised wreck of U-250: the sinking provided valuable information to the Soviet Navy.


24 July 1944
Submarine U-479 lightly damaged by submarine chasers with depth charges


1 August 1944
Submarine U-348 lightly damaged by patrol boats SKA-83 and SKA-103 and submarine chaser MO-108 with depth charges.


26 August 1944
Submarine U-745 lightly damaged by damaged by patrol boat SKA-292 with depth charges.


1 September 1944
MO-312 fired against German MTBs that had attempted to destroy the wreck of the German submarine U-250 that was sunk in shallow water, to prevent the soviet recovering of the same wreck. No hits were done but during the retreat the S-80 was sunk by mines (5 MIA) and the Germans had failed their mission.



18 November 1944
I Battle of Sorve Cape
A double clash erupted when German motor torpedo boats attacked a group of Soviet ones . The German S-68 was damaged by Soviet TK gunfire and S-116 was damaged by a soviet La-5 aircraft (with one KIA, while S-68 was further damaged), the soviet TK-801 suffered damages (other German units involved were S-65 and S-69) and TK-807 run aground after collision with TK-801. Then the German minesweeper M-328 and four auxiliary minesweeper R-boats had a clash with four Soviet minesweepers of “Fugas” class, claiming to have sunk one of them (actually only Tszcz-207 Shpil received the hit of 105mm and was damaged) then the German minesweeper was subjected to heavy fire from at least four gunboats: there were three of them, Volga, Bureya and Zeya but no other hits were obtained, ending the engagement with a substantial draw and mutual retreat.


21 November 1944
II Battle of Sorve Cape
A second heavier clash around Sorve Cape erupted when the German minesweeper M-328, the patrol ships V-5713 “Sudetenland”, V-302 “Bremen” later joined by minesweeper M-423 fought against gunboats Volga and Zeya and motor torpedo boats TK-96, TK-136, TK-195, TK-197 and TK-198.
The battle occurred on two times (morning and afternoon), the two Soviet MTBs TK-96 and TK-198 were lightly damaged but the German patrol ship V-5713 Sudetenland got a direct hit by the gunboats that opened an hole on the hull. The heavily damaged unit had to be towed away by V-302 Bremen and the German group retreated, giving the victory to the Soviets.
Image

Design of the Soviet gunboats: they were the backbone of a number of small-medium size operations in Baltic and Ladoga Lake, taking part in some battles. Ironically the hulls were built before the war in Germany, the Soviet Navy then converted them in gunboats.


29 November 1944
The fate of the German submarine U-479 is unclear: for years the Soviet sources claimed that the soviet submarine Lembit rammed and sunk such submarine, but modern evaluation thinks that at real the Lembit collided with a wreck. The cause of the loss of U-479 remain a mystery, the wreck has never been found, usually it's considered possible that the submarine was lost on soviet old mines of 1941. Yet according a study of Andrey Kuznetsov it's possible that was victim of a depth charges attack by a Soviet small patrol boat (sadly it's not known the exact name of the attacker, that at first claimed to have achieved success).
Only the recovery of the wreck could give explanations.
Loz
[+-]
User avatar
Soviet cogitations: 11675
Defected to the U.S.S.R.: 06 Dec 2009, 23:17
Philosophized
Post 25 Oct 2013, 14:13
Interesting, thanks.
Soviet cogitations: 150
Defected to the U.S.S.R.: 20 Feb 2010, 11:57
Resident Admiral
Post 25 Oct 2013, 18:31
Quote:
Interesting, thanks.

Thank you for leaving a comment ^^
BTW every kind of question, curiosity for details etc... it's very welcome.
Soviet cogitations: 150
Defected to the U.S.S.R.: 20 Feb 2010, 11:57
Resident Admiral
Post 05 Mar 2014, 16:48
1945
Note: Most of Data about the engagements in Baltic Sea during 1945 are lacking. A number of KTBs (War Diaries) were not written or they were destroyed during the German retreat. Sadly this means that there is less certainty about identity of German warships involved in clashes.


4 or 6 January 1945
There are two versions about the sinking of the Soviet submarine S-4. According most sources she was rammed and sunk by the German torpedo boat T-3 on the night between 4/5 January. It's however mentioned also the possibility that she was rammed and sunk by the German fleet torpedo boat T-33 on the night between 6/7 January.
In both cases, it was the only submarine sunk by a major (torpedo boat class or higher) warship in Baltic, and the only soviet submarine loss in Baltic during 1945.
If submarine was sunk by torpedo boat T-3, she was later avenged by the submarine L-21, because the torpedo boat T-3 sunk together the sister-ship T-5 on L-21's mine-field.
Before her loss, S-4 collected 2 victories (both sinking).


9 January 1945
It's usually said that the German submarine U-679 was sunk with depth charges by the soviet small submarine-chaser MO-124 (even by western sources). However it's almost sure that the MO-124 had instead attacked (without effect) U-637.
It's probable that U-679 was sunk few days later on soviet-laid mines.


18 February 1945
Some sources say that German merchant Tolina (1923 GTR) was torpedoed and sunk by soviet motor torpedo boat TK-158, but it's more likely she was sunk by aircrafts.


18 March 1945
Soviet motor torpedo boat TK-66 was sunk, while TK-195 was damaged by enemy motor torpedo boats. No details about number, identity and possible losses/casualties on German units.


27 March 1945
German motor torpedo boat S-64, S-69 and S-81 attacked a larger group of soviet motor torpedo boats: TK-16, TK-60, TK-136, TK-166, TK-196 and TK-200.
Despite numerical advantages, Soviet units were D-3 class and they were smaller and less armed (compared with the German motor torpedo boats).
The soviet units suffered the surprise: TK-166 was sunk by S-64, while TK-196 was damaged, captured and later scuttled by S-81.
All the other soviet units ( TK-16, TK-60, TK-136 and TK-200) received damages and retreated.
Total amount of Soviet human losses is unclear (there were however 14 POW).
Unclear damages or casualties on German side: however one report say they had just one wounded.


15 April 1945
Raid in Danzig Bay
Soviets decided to deploy the new Komsomolets class of motor torpedo boats: just few units were completed but their advanced features and performance were needed.
It was planned a daring raid deep into the enemy controlled Danzig bay: the two units TK-131 and TK-141 aimed at the German destroyer Z-34.
A torpedo struck the destroyer that was badly damaged, while the motor torpedo boats escaped without damage.
Even if the destroyer didn't sunk and was later able to be evacuated, it will be never repaired by Germans and remained out of service until the (close) end of War.
It was the only German properly said destroyer to have been directly lost (= no more operative) by a Soviet naval attack.
After the war the destroyer was given to Americans but her conditions were considered unfit and not worthy for repair, so the Z-34 was scuttled.
Image

Photo of destroyer Z-34: being a modern and late-production destroyer, she was larger and more heavily armed than most of Allied destroyer.
Image

Photo of TK-131: her class could have inflicted heavy losses to the Germans if it could have been put in service earlier. After the war it will be mass-produced and will score victories against the Chinese Nationalist Navy (including a former American escort destroyer sunk) in the last phase of the Chinese Civil War, being used by Communist forces.
TK-131 has been preserved as a memorial.


16 April 1945
During the night, Soviet reports that a large group of small gunboats, BK-200, BK-201, BK-202, BK-204, BK-205, BK-206, BK-212, BK-213 and BK-214, attacked a convoy of German small units, claiming the sinking of 2 barges and 2 other boats.
Sadly, lacking the proper German war diaries of this phase of war, it's hard to have a clear description of the event.
Some documents however list a German armed barge, the PiLb-554, as lost due mine that night.
It's possible that the barge was instead sunk during the attack.


25 April 1945
German merchant Emili Sauber (2475 GTR) was torpedoed and sunk by soviet motor torpedo boat TK-133. The merchant was almost surely empty because was planned to take evacuated on board (both civilians and military personnel). Sometimes it has been argued that the merchant was sunk by aircrafts, but it's now confirmed she was victim of the new Komsomolets class.
Image

Photo of the Emili Sauber: she was the only enemy merchant sunk by a Soviet MTB in Baltic Sea.


26 April 1945
German MFP (armed landing craft) F-248A was often said to have been sunk by soviet motor torpedo boats TK-135 and TK-131 but it's more likely she was sunk by aircraft.


That same day, during landing operations at Pillau, soviet small gunboats BK had a clash against German armed barges. Soviet side claims that one enemy barge was sunk and a second one was set afire. Also this time the absence of German documents prevents to have a clear vision of what happened.
It's possible that the German MFP (armed landing craft) F-506 was involved in the fight.


3 May 1945
German destroyer Z-6 reported an attack by Soviet motor torpedo boats. Unclear event.


6 May 1945
German armed barge PiLB-43I was sometimes claimed as sunk by Soviet motor torpedo boat, but it's more likely she was sunk by aircraft.


7 May 1945
Soviet submarine chaser BMO-595 was attacked and sunk by German motor torpedo boats.
Due the ending of the war, there is a lack of details.


9 May 1945
The official day of surrender of Nazi Germany for Soviet Union (Victory Day: it was 8 May for the Allied due time-difference).
Soviet motor torpedo boat TK-93 has an engagement against German motor torpedo boats and got damages, (the enemy convoy was made by 19 units, among them some motor torpedo boats, instead soviets had 3 motor torpedo boats), a soviet aircraft damaged the motor torpedo boat S-216 (that suffered 1 kia and 13 wia).


On that same thay occurred what appear to be the last ever naval engagement of the European Front of the Second World War.
With the end of the War, a convoy formed by collaborationist Latvians with seized tugs and other units sailed from Ventspils to escape in Sweden.
The convoy was formed by the tugs Rota (largest one, with 300 passengers), Una (100 passengers) and Strelnieks (150 passengers), two towed barges and two schooners brought other passengers. Only the tugs had weapons.
Most of the people onboard were former Latvian collaborationists, their families and some German soldiers who had hidden.
Once the convoy had almost reached Gotland (they were possibly aiming at Slite harbor) they were intercepted by a Soviet formation.
The soviet group had: submarine chasers MO-121, MO-122, MO-131, MO-204, the patrol boats (former D-3 motor torpedo boats) n°175, n°176, n°177, n°183, n°192, and the smaller ones LMC-537, LMC-540, LMC-541, LMC-542, LMC-543, LMC-545 and LMC-546.
Strelnieks had engine troubles and when she spotted the soviet boats opened fire: soviets returned fire and sunk the tug. Once the tug Rota was stopped, the crew threw overboard the weapons and laid down the flag, surrendering.
Soviets captured all the other units, except Una that reached Sweden as planned.
One towed barge and the two schooners were scuttled by soviets, while both the towed barge n°833 (captured intact) and the tug Rota were used to gather all the prisoners to brought them back.
Due the high number of prisoners (670 according one source, up to 800 according another source), a number of them had to be spread among the soviet units because there wasn't space enough on the captured tug and barge.
One soviet source identified the Rota just with the letter "C", while the n°833 was incorrectly named "F-833" (as if she was one of the German units of MFP class, but she wasn't).
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