Interactive atlas · Black Sea, 1941–1944
What Romania's mines and warships sank in the Black Sea
Destroyers, submarines and gunboats of the Soviet Black Sea Fleet were lost in Romanian mines, attacks and naval operations between 1941 and 1944. The map reconstructs every case, including the ones where attribution stays uncertain.
Minefields caused most of the losses: 16 of the 18 in the file have that cause.
The loss map §
Every mark is a Soviet vessel lost wholly or partly to Romanian causes. The shape shows the strength of the evidence, and the broken ring shows an approximate position: many wrecks were never found. Select a mark for the vessel's documented record.
No vessel matches the chosen filters.
Vessel index
A small fleet with outsized effects §
Romania needed no fleet to match the Soviet Black Sea Fleet to inflict real losses. The Royal Romanian Navy concentrated its few ships on two things geography made efficient: mining home waters and escorting convoys along the routes Soviet submarines typically patrolled hunting convoys. A submarine hunting merchantmen typically closes inshore; close inshore, the mines waited — the distribution below shows the result.
The distribution is: of 18 losses, 16 struck mines and two were sunk directly by Romanian warships. Of the cases, six are solid attributions, 10 probable contributions and two remain disputed. Without the two disputed cases (S-34 and M-118), the totals would be 15 mines and 1 direct attack.
How Moskva was lost §
On the night of 25–26 June 1941, days after Romania entered the war, a Soviet force shelled Constanța. It was the only direct destroyer action in the Black Sea recorded in the sources reviewed for this file, and the most famous Soviet loss in Romanian waters. The reconstruction follows six moments, from approach to wreck.
1The approach
The leader Moskva and the destroyer Kharkov closed Constanța by night, without accurate charts of the minefields. A week earlier the Romanians had laid about 1,000 mines between Midia and Tuzla.
2The bombardment
Around 04:00 both ships fired on the port. An oil tank and an ammunition wagon were hit. Mine paravanes were streamed but high speed damaged them.
3The reply
The Romanian destroyers Regina Maria and Mărăști, at anchor off Eforie, answered from about 14 kilometres, hard to spot against the shoreline. The German Tirpitz battery joined in, late.
4The withdrawal
The Soviet ships laid smoke and withdrew north-east. The captain worked up to 30 knots and zigzagged. The manoeuvre took them straight into barrage S-10.
5The explosion
At 04:26 a column of water rose amidships, to port. The ship broke in two: the bow rolled over and sank at once, the stern floated for minutes with its propeller turning in the air, then went down. The wreck team believes spare torpedoes on deck magnified the mine blast.
6Why it stays debated
Most sources name the Romanian mine as the cause. Artillery hits were proposed, as was a friendly torpedo from the submarine ShCh-206, a few kilometres away. The 2011 divers rated gunfire unlikely and the torpedo the weakest theory: range, smoke and documents support neither. One night, several weapons, a single wreck: the question is not fully closed.
Timeline, 1941–1944 §
Every loss appears on its date. The year 1943 is missing for a reason: no Soviet loss that year could be tied to Romanian forces in the sources reviewed. Select a name to open its record on the map.
1941
1942
1943
No Soviet loss in this year could be tied to Romanian forces in the sources reviewed.
Crews and dimensions §
These were crews, not icons. Where sources give figures, the page shows them whole: 268 dead and 69 rescued on Moskva, 44 dead on ShCh-212, 51 on S-34, 57 on L-24, 38 on ShCh-206. Where figures are missing, the page says so.
The silhouettes below share one scale, with a 105-metre football pitch beside them, so a coastal submarine cannot be mistaken for a destroyer leader.
Why the war took this shape §
Constanța was Romania's only naval port that mattered, and the gateway for convoys to Odesa and Crimea. Soviet submarines typically hunted along these coastal routes, where shallow water and the shoreline took the depth from under them. The Romanian navy, too small for fleet battles, concentrated on what it could do well: defensive minelaying, escort work and short, limited operations. After the fall of Odesa and Sevastopol the same waters were mined again, off Odesa and Snake Island. The Soviet fleet was far larger, but shallow inshore waters, coastal artillery and the demands of the land front made mines and escort count for more than hull numbers. That is why mines dominate this map.
Questions §
How many Soviet ships did Romania sink in WWII?
The file checked on 20 September 2026 holds 18 vessels — six solid attributions, 10 probable contributions and two disputed cases. The total depends on which confidence grade is counted.
Which Soviet ship was sunk off Constanța?
The best known is the destroyer leader Moskva, lost on 26 June 1941 in barrage S-10. The same waters later took the submarines M-58, M-34, M-59 and ShCh-213, all in Romanian mines, with varying degrees of certainty.
How was the destroyer Moskva sunk?
Withdrawing from the Constanța raid under Romanian and German fire, she entered mine barrage S-10 and broke in two at 04:26. The wreck surveyed in 2011 supports the mine theory, probably magnified by deck torpedoes. Gunfire and a friendly torpedo remain discussed but weak hypotheses.
How many Soviet submarines were lost in Romanian mines?
Of the 15 submarines in the file, 13 were lost in mines laid or co-laid by the Romanians, off Constanța, the Bulgarian coast, Odesa and Snake Island. Two submarines were sunk directly by Romanian warships: ShCh-206, confirmed, and M-118, disputed.
How strong was the Royal Romanian Navy?
Far smaller than the Black Sea Fleet: four modern destroyers and leaders, a few minelayers, old torpedo boats and small craft. Its strength lay in how it used its few ships: systematic minelaying, escort work and short battles of its choosing, under coastal artillery cover.
What was the role of Amiral Murgescu?
She was the mine war's main instrument: she laid the June 1941 Constanța barrage, the October 1941 Bulgarian coast fields, the June 1942 Odesa barrage and the autumn 1942 Snake Island barrages. She is linked to 16 of the 18 losses in the file, more than any other Romanian ship.
Sources and method §
The file closed on 20 September 2026. Verification drew on specialist ship histories (uboat.net, where a page exists), on wreck surveys (Moskva in 2011, ShCh-213 in 2008–2010, ShCh-211 in 2005, L-24 in 1991 from diver reports), on the Romanian history of the minelayer Dacia (worldwar2.ro) and on an independent naval encyclopedia; the Romanian Navy's official history served only for the origins of the Romanian units, not as loss evidence. The specialist loss chronology and the Russian martyrology were reachable only through extracts and serve solely as second confirmation.
A vessel entered only if the evidence ties it to Romanian forces, Romanian-laid mines or a Romanian naval action. Each gets a single grade: solid attribution, probable contribution or disputed case. Weak cases with insufficient evidence stay out of the total, and the researched exclusions are recorded.
Exact positions appear only where a source gives them: ShCh-206, M-33, M-118 and L-24. The rest are approximate zones, drawn as such. Likewise, crew figures appear only where documented; otherwise the page says they are missing.
Where sources disagree — a Romanian or a Bulgarian field for S-34 and L-24, Romanian depth charges or a German floatplane for M-118, UJ-116 or a mine for ShCh-213 — both versions stand beside the vessel's record, each with its source. Each vessel's source list leads with the strongest available evidence; referenced campaign pages appear only as reading trails, at the end of the list, never as principal evidence.
Crew figures are the reported figures from the vessel histories, and dimensions are technical class data, not attribution evidence. Two files (YA-26, YA-27) rest on few related sources — the page marks them as such. Each vessel record lists its sources in order of strength.