For those new to scuba, three different scuba certification agencies might be run into. The Professional Association of Diving, or PADI, is perhaps the best known. Then there are the National Association of Underwater Instructors, or NAUI, and the Scuba Schools International, or SSI. All three provide classes to get divers started on a hobby that's incomparable in adventure.

Basic classes start off with classroom instruction to help students become familiar with the gear. This includes tanks, gauges and so on. Once students are comfortable with the gear, it's time to put it on. Swimming with scuba gear is not like jumping in the water in simply a suit. It's a whole new experience that requires some getting used to. This is where most schools will do "pool dives" to help acclimate students to the gear and its feel underwater.

Pool dives can be done right in a school's own facilities, but oftentimes community pools are used. It is during this part of the lesson that potential scuba divers are born and those who might not find the sport to their liking will begin to discover this. Scuba is a serious sport that requires knowledge and understanding for safety.

Many diving schools will offer starter courses that continue for anywhere between four and eight weeks, depending on teaching style. Each lesson is important before recreational diving is attempted without an instructor present. In addition to diving, they generally include basic first aid and CPR.

After students are familiar with gear, understand how it feels, and are adept at reading its instruments, many schools will offer real dive excursions for beginning divers. These are valuable to attend and they give the first real glimpse of the world that awaits beneath the water.

Scuba diving is not a sport to be jumped into without careful preparation and classroom experience. For those who want to simply undergo recreational training, the depths of 130 feet more than suffice to see some great sights.   part one