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The nitrox course is designed for any diver, not just for those who can recite Science of Diving verbatim. It's a QC/QA thing, trying to ensure that those who get nitrox fills don't kill themself out of mere incompetence.You are right. I am wondering if I will learn anything more in Nitrox course than in Science of Diving that I have already taken. I can calculate PPO2, know the limitations, understand Oxygen clean and service, know if equipment are compatible. It seems to me that I have already learnt all the theory and Nitrox course is almost 100% theory only.
I have a STEM background. As have my kids. When I took my nitrox class, the LDS messed up, so we showed up for the class without having received the reading material (which you're supposed to have read and understood before taking the class). We aced the exam, without having read anything. Did I feel resentful? Not at all. It was a hurdle to pass, so my club could have some assurance I wouldn't kill myself from the fill I got with them. I passed it and have the plastic to prove that I passed.