616fun:
Don't look at it as 'Advanced' Open Water. Think of it more as 'diving with professional supervision.'
5 more dives isn't going to make you advanced, but it will help you be exposed to different diving environments (deep, night, etc) with someone trained to expose you to them.
Depends on who you take the course with. If you took it with me, you'd come out with some real skills, including ...
- how to develop a dive plan, and execute that plan during the dive
- how to determine how much air (or nitrox) you breathe at a given depth
- how to develop a dive plan based on the amount of breathing gas you have available
- how to control your buoyancy to do mid-water ascents and safety stops without the use of a line
- how to use breathing techniques to control your buoyancy during the dive
- how to descend and stop without touching or mucking up the bottom
- how to communicate with, and work with, your dive buddy
- how to recognize common diving problems and respond to them before they become diving emergencies
- how to navigate underwater using a combination of compass and natural navigation techniques
- how to deploy a surface marker buoy, and under what circumstances you'd want to deploy one
- how to locate an object lost on the bottom, and retrieve it using a standard open-cell lift bag
Those techniques may not make you an advanced diver, but I guarantee they'd make you competent to plan and execute your own dives in variety of diving environments, and do it in a safe and controlled manner.
The dive instructor who's going to sell you the class as nothing more than a few supervised dives is selling you short ...
... Bob (Grateful Diver)