This is a great way to give your students an extra day of training about
dive physiology and other topics related to extended bottom times and
more advanced gases.
A student moving on to Rec 2 would only have to complete three of the
four Rec 2 modules to be certified as Rec 2/Advanced. These would be
the critical skills module, deep module, and night module.
Nitrox dives in the Red Sea.