The course was good. The book and all the material is out dated, way out dated. The dives very good and you learn the importance of good underwater communication. Day 1 included a no mask drill, used to simulate a silt out condition, where the 3 man team has to follow a line out of the cavern. Our line was run around a few large obstacles which not only tested our communication, but our nerve. Blue Grotto was our dive site for day 1. It is a place where OW certification check out dives are done, and some of those divers stirred up the bottom for us. Day 2 was at Paradise Springs, and that was nothing but a small opening on the surface that went down 100 feet. We seen first hand how fast the silt gets up from the bottom and how easy the cavern can become very dark. Here we did some lights out drill and several line drills.