| Shipwrecks |
- 2 May: SM UB-31, Unity
- 5 May: Kyarra, SM UB-119
- 8 May: SM U-32
- 9 May: SM UC-78
- 10 May: SM UB-16, HMS Vindictive
- 11 May: Sant Anna, SM U-154, Verona
- 12 May: SM U-103, SM UB-72
- 13 May: SM UB-114, Zaanland
- 14 May: HMS Phoenix
- 17 May: SM U-35
- 18 May: Catapulte, SS Warrimoo, HMS Chesterfield
- 21 May: Rosalind
- 23 May: Innisfallen, HMS Moldavia, SM UB-52
- 26 May: SM UB-74
- 31 May: HMS Fairy, USS President Lincoln, SM UC-75
- Unknown date: SM UB-70
|
|---|