Ok, so this obviously is NOT going to be a popular opinion...but I encourage my students to take AOW directly following their OW course. The reason...in OW the students are taken through a series of skills they need to be able to demonstrate "mastery" of, to get certified to dive. Oh...and then they go on a short tour of the dive site, usually just watching the fins of the instructor or DM that is leading the dive.
So, following any of the OW courses from any of the certification agencies...are they ready to grab a buddy from their class and go dive? Theoretically, yes. But most students are still a bit green after only 4 dives. (Or maybe I'm the only one who was...?)
AOW = Advanced OPEN WATER. This is not advanced diving. This is taking the skills that you learn in OW and applying those to 5 real dive situations, adding task loading (i.e. more instruction with navigation, using lighting underwater, etc.) all under the supervision of an instructor.
Now, being able to appreciate those who want to get a few more dives under their belt before they take AOW...I would strongly suggest that they find someone with some experience and certs under their belt to dive with. Club dives are good ways to do this.
What I wouldn't want to see...two OW students fresh from class, an unforeseen emergency arises, minimal rescue skills, still trying to figure their gear AND their buddies gear out. Yeah, that's just not a scenario that I want to hear that my students were in.
I teach basic rescue (tows, theory) in OW...but realistically, with all that you learn in OW, are you really prepared to be the lead diver in a rescue with your OW cert?
I believe in more education. There's alot to learn in scuba...and there's two ways to learn everything. The easy way, and the hard way.
Cindy
http://www.girldiver.com