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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
flagthe Netherlands
24%
15%
9%
51%
33
flagAustralia
9%
28%
12%
50%
32
flagSpain
33%
16%
0%
50%
12
flagCanada
10%
30%
10%
45%
20
flagAustria
23%
17%
13%
44%
52
flagGermany
16%
30%
14%
38%
391
flagGreece
31%
12%
18%
37%
16
flagthe United Kingdom
25%
31%
7%
34%
102
flagIndia
22%
38%
5%
33%
18
flagPoland
33%
22%
10%
32%
3566
flagthe United States
17%
38%
11%
31%
139
flagRepublic of Ireland
33%
26%
13%
26%
15
flagSwitzerland
21%
52%
8%
17%
23
flagthe Philippines
50%
20%
20%
10%
10