You always have the option of just reading the book for some courses. For night for example there might be a couple things you pick up from reading the book. The dives are just dives. Fine if you want to do them. Same for wreck and a couple others. There are some safety rules you should read and understand.
Others like buoyancy are skill related.
Personally I found Drift informative. Not because of the knowledge but because on the second dive the next day I had to lead a group of strangers from briefing all the way through the dive. They were not students but a random group of divers. Learned some about leadership, managing air consumption when leading, herding cats, etc.
Others like buoyancy are skill related.
Personally I found Drift informative. Not because of the knowledge but because on the second dive the next day I had to lead a group of strangers from briefing all the way through the dive. They were not students but a random group of divers. Learned some about leadership, managing air consumption when leading, herding cats, etc.