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Not at all ... but you cannot also rely on just those. That's why you have both pool and open water in-water skills practice. Furthermore, if you took Rescue class several years ago and haven't practiced those in-water skills since then, I wouldn't rely on them too much either.ReefHound:So I guess we can just eliminate the classroom sessions from the Rescue course?
Scuba skills aren't "just like riding a bicycle" ... in an emergency you want to be able to rely to a degree on allowing your body to respond without conscious thought to certain tasks, while your brain is focused on the tasks required specifically to deal with the emergency. Dealing with that sort of task-loading requires in-water practice.
Dealing with emergencies usually doesn't give you a whole lot of time to think about anything ... you have to be prepared to react. This is particularly the case in situations like the one we're discussing here that involve a runaway ascent. You're only going to get a few seconds (or less) before the situation gets beyond your ability to control it.
... Bob (Grateful Diver)