You will get wet when you wear one but the temperature of the water will not affect you. A dry suit is meant to be worn when you are diving into contaminated water and need to stay dry and insulated at the same time. Then there is a bathing suit meant for really deep dives called the hot suit.
The other accessories you can add is the dive watch. It can withstand depths and it is a handy gadget to have as it will tell you when you need to swim to the top, tell you the depth you have covered and so on. You can also get certification for scuba diving online.
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In case you think that purchasing the gear will cost you a bomb, there is a way out. You can rent your dive gear and that is what most beginners do. However, no matter what happens, you have to test it all before your dive so that nothing goes wrong. There can be some serious injuries due to improper equipment and it can also be fatal!
Just remember to prepare yourself well before any of your scuba diving trips so that you can thoroughly enjoy.
For a wonderful holiday that will not break the bank, Phuket Island Thailand has to be one of the most attractive destinations on the planet. Arrive, relax, indulge, and experience.