Sweet so NAUI and NSS both have switched to a new model where you can penetrate to 1/3 of doubles. I wonder if TDI will do so soon as well?
Naui’s been that way for a while. I personally loved the naui’s system. I did intro to tech then cavern, then cave 1. You can now do cavern and cave 1 together. I personally think taking time between classes to learn is ideal. My wife and I are very conservative and just because we could do 2 nav decisions at cave 1, we chose to slowly progress in each cave. I think we dove mainline only in all major Florida caves many many times for a year before we considered putting in jumps. Cave 1 was rewarding for people like us. I could see how that much freedom could be dangerous for someone who’s a zero to hero nonconservative diver. It definitely could give someone just enough rope to hang themselves. I’m not a fan of the limiting intro rules.