IDEA specialty courses are designed for practical purposes with the same conditions as experimented in the courses, always together with a buddy of same or higher certification. Not-diver certifications enable to effect activities as designed in the courses only.
Specialties opened to not diver also: Dive Medic & Oxygen Provider (first aid, CPR and oxygen use in diving accidents), Dive safety assistant.
Basic specialties: River diver, Dry Suit.
Advanced specialties: Deep Diver, Advanced Deep Diver, Limited Visibility Diver, Underwater navigation, Night Diver, Rescue Diver, Search & Recovery, Wreck Diver and other courses.