| Shipwrecks |
- 1 Apr: Giovanni delle Bande Nere, HMS P36, HMS Pandora, Skytteren, Storsten
- 2 Apr: David H. Atwater, Tiger
- 3 Apr: Shaumyan
- 5 Apr: HMS Abingdon, SS Catahoula, HMS Cornwall, HMS Dorsetshire, Empire Beacon, HMS Hector, HMS Tenedos
- 6 Apr: HMS Havock, HMIS Indus
- 7 Apr: Lancing
- 8 Apr: USS Dewey, Byron D. Benson, Shch-421, HMT Svana
- 9 Apr: Q-112 Apra, HMS Hermes, HMS Hollyhock, HMS Lance, Q-111 Luzon, USS Napa, Sagaing, HMAS Vampire
- 10 Apr: USS Canopus
- 11 Apr: Empire Cowper, USS Finch, HMS Kingston
- 13 Apr: El Occidente, Empire Amethyst
- 14 Apr: Benwood, Margaret, U-85, U-252, HMS Upholder
- 20 Apr: Empire Dryden
- 22 Apr: San Jacinto, , SS Connecticut
- 23 Apr: Lammot Du Pont
- 24 Apr: Empire Drum
- 26 Apr: USS Sturtevant
- 29 Apr: HMS Urge
- 30 Apr: Ashkhabad
- Unknown date: U-702
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