| Shipwrecks |
- 1 May: Angarstroy, HMS Punjabi
- 2 May: USS Cythera, HMS Edinburgh, Hermann Schoemann, ORP Jastrząb, USS Mindanao, Mizuho, U-74
- 4 May: USS Pigeon, USS Tanager, Wa-1
- 5 May: Bévéziers, Kikuzuki, USS Genesee, Maryann
- 6 May: Alcoa Puritan, D'Entrecasteaux, Empire Buffalo, USS Luzon, USS Oahu, Tama Maru, USS Quail
- 7 May: Le Héros, Shōhō, USS Sims
- 8 May: USS Lexington, Monge, HMS Olympus
- 9 May: U-352
- 10 May: HMHS Ramb IV
- 11 May: HMT Bedfordshire, HMS Kipling, HMS Lively, USS Neosho
- 12 May: Empire Dell, HMS Jackal, Okinoshima
- 13 May: Norlantic
- 14 May: Dzerzhinsky, Potrero del Llano
- 15 May: HMS Trinidad
- 17 May: Challenger, I-28, I-64
- 20 May: George Calvert
- 21 May: Faja de Oro, Elizabeth, Presidente Trujillo
- 23 May: Samuel Q. Brown
- 24 May: L-21
- 25 May: Asahi
- 26 May: SS Carrabulle
- 27 May: Alamar
- 28 May: Sylvan Arrow
- 29 May: U-568
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