Because of their interest and scientific commitment to the field of undersea and hyperbaric medicine, the UHMS recognizes the following organizations as affiliates:

• Aerospace Medical Association (AsMa)
• European Underwater and Baromedical Society (EUBS)
• Gesellschaft für Tauch-und Über-druck-medizin e.V (GTUM)
• Japanese Society for Hyperbaric Medicine (JSHM)
• Société de Médecine et de Physiologie Subaquatiques et Hyperbares de Langue Française (MEDSUBHYP)
• Southern African Underwater and Hyperbaric Medical Association (SAUHMA)
• South Pacific Underwater Medicine Society (SPUMS)