As a non-certified diver, you can sign-up to take the introductory"Resort Course", (about 75 minutes of video instruction and then another hour or so in the pool depending on the # of people and how quickly you pick everything up) which includes your supervised dive. If you want to dive again during your trip, it is $50 per person, per dive. The Resort course is not offered on the weekends and you will need to be at the Watersports hut by 8:45am to get started.
Taking a 2nd dive after the Resort Course is a great way to find out if SCUBA is something you will want to do more and the price is not bad so it's a good opportunity to take advantage of. I am not certified although my husband is. Every other trip, I will take the Resort Course so we can dive together, but I found I prefer snorkeling to SCUBA. Last trip with my sister & brother-in-law, he opted to get certified at CSS since he fell in love with SCUBA and wanted to dive more than the 1st trip. It was a great investment for him.
I will also say that the Dive Team at CSS are incredibly patient and fun. I have issues clearing my mask, and they helped me through so I was comfortable underwater. We spend a lot of time skiing, snorkeling, sailing and SCUBA when we get home to CSS, and it is always a phenomenal experience.
Give it a try and you will know right away if it is where you want to spend your time & money.
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