@5cubaN00b There is no universal requirement for "group" training like this, at least not in the US. Each scuba professional is required to renew their certification each year, but that's really reading some stuff and clicking buttons. Every 2 years we have to complete first aid, CPR/AED and O2 Provider (which of these you need varies a little based on your level and agency). One thing you can ask for is to see the emergency/first aid equipment - marine radio, first aid kit(bandages, tourniquets, antiseptic, etc), O2 kit (various masks, full cylinder, etc), fire extinguisher, AED if present. Most boat/dive briefings go over these, and generally repeat them if there are new divers on the boat, but many people don't take the time to really listen or watch where the crew points as discussing these. I have to admit even I have been a little too complacent about assuming things are good when they say they have all of these items.
Instructors who regularly teach SSI Stress and Rescue, PADI Rescue Diver or equivalents do practice many of these if they participate with the students (vs observe while students and assistants do the practical dives). I've taught the course, or assisted, dozens of times. I think this is the most important "specialty" course any diver can take. When combined with First Aid, CPR/AED and O2 Provider (like React Right from DAN or others), you should feel much better prepared. When I was teaching in MD, many of our pros and more seasoned divers who had completed these would often come to the diving part of the course and help out.
Instructors who regularly teach SSI Stress and Rescue, PADI Rescue Diver or equivalents do practice many of these if they participate with the students (vs observe while students and assistants do the practical dives). I've taught the course, or assisted, dozens of times. I think this is the most important "specialty" course any diver can take. When combined with First Aid, CPR/AED and O2 Provider (like React Right from DAN or others), you should feel much better prepared. When I was teaching in MD, many of our pros and more seasoned divers who had completed these would often come to the diving part of the course and help out.