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Polish river monitor 'Krakow'
Prototype German submarine U-1406
British marine monitor Cyclops
French submarine cruiser "Surcouf"
Surcouf was the largest French submarine cruiser having served during the Second World War. The boat was lost during the night of 19 February 1942, in the Caribbean Sea, possibly after colliding with an American freighter. Surcouf was named after the French privateer Robert Surcouf. It was the largest submarine built until surpassed by the first Japanese
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Answers by country

Polish river monitor 'Krakow'
Prototype German submarine U-1406
British marine monitor Cyclops
French submarine cruiser "Surcouf"
answers
flagEstonia
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0%
100%
10
flagthe Netherlands
23%
17%
8%
50%
34
flagAustralia
9%
28%
12%
50%
32
flagBelgium
20%
10%
20%
50%
10
flagSpain
30%
23%
0%
46%
13
flagAustria
22%
16%
13%
45%
53
flagCanada
10%
30%
10%
45%
20
flagGermany
17%
30%
13%
38%
438
flagthe United States
15%
34%
10%
38%
154
flagGreece
27%
16%
16%
38%
18
flagthe United Kingdom
26%
28%
8%
34%
113
flagIndia
22%
38%
5%
33%
18
flagPoland
34%
22%
10%
32%
3665
flagRepublic of Ireland
29%
35%
11%
23%
17
flagSwitzerland
20%
51%
6%
20%
29
flagthe Philippines
50%
20%
20%
10%
10