German submarine U-409
Summary of raiding history

Date
Name
Nationality
Tonnage
Fate
30 October 1942
Bullmouth
United Kingdom
7,519
Damaged
30 October 1942
Silverwillow
United Kingdom
6,373
Sunk
9 March 1943
Malantic
United States
3,837
Sunk
9 March 1943
Rosewood
United Kingdom
5,989
Sunk
4 July 1943
City of Venice
United Kingdom
8,762
Sunk
4 July 1943
HMS LCE-14
Royal Navy
10
Sunk (transported on board City of Venice)

Question: For how much gross register tons (GRT) did the German submarine U-409 sink and/or damaged ?
Answer: German submarine U-409 sunk for a total of 24,961 gross register tons (GRT), 1 damaged with 7,519 GRT, and one sunk whilst being transported.