The Emergency First Response (EFR) course is designed for divers and non divers and covers most common CPR and First Aid emergencies that can occur. It is also a prerequisite for the PADI Rescue Diver course.
After the Primary and Secondary Care (EFR) course complete the PADI Rescue Diver course and the PADI Emergency Oxygen Provider course. Together these three courses round out your ability to potentially handle scuba diver emergencies.