A guide to diving in Koh Samui:

**Preparation:** - **Diving equipment**: Basic equipment such as masks, snorkels, and fins. If you don't plan to buy them, you can rent them at a local dive shop. If you have the means, you can also prepare a waterproof camera to record the underwater beauty. Be sure to ensure the quality and fit of the equipment, such as a mask that fits your face and a snorkel with no water leakage. - **Health status**: Make sure you are in good health and do not have any diseases that are not suitable for diving, such as heart disease, high blood pressure, etc. Do not drink alcohol before diving and get a good rest. - **Diving courses and certificates**: If you are a beginner and want to experience diving in depth, you can take a local diving course and obtain a PADI Open Water Diver Certificate (OW), etc. The course usually includes theoretical study, calm water practice, and open water practice. **Recommended diving spots:** - **Koh Tao**: An internationally renowned diving spot with a water depth of 5-40 meters. There is a rich variety of marine life and diverse underwater terrain, making it ideal for divers of different levels. There are many diving schools and professional instructors in the area, so even beginners can get good guidance. - **Koh Nang Yuan**: You can stroll along the sandbar, and it is also a great place for snorkeling, where you can see all kinds of beautiful corals and tropical fish. The water is clear and the visibility is high, providing excellent conditions for diving. **Precautions:** - **Weather and sea conditions**: Pay close attention to the weather forecast and avoid diving in windy, cloudy, or bad weather conditions. When there is no sunlight, the visibility of the seabed is low, and strong winds and waves will increase the danger and discomfort of diving. - **Safety first**: Strictly follow the instructions of the diving instructor and the diving rules, and do not exceed your ability. Pay attention to your breathing rhythm during diving and avoid breathing too fast or too slow. - **Protect the marine environment**: Do not touch or destroy corals and marine life, and do not litter. Let's protect the beautiful marine ecology together. In short, Koh Samui offers a wealth of diving experiences, but be sure to be well prepared to ensure your safety while enjoying the fun of diving. If you want to know more about diving in Koh Samui, such as local dive shop recommendations, course fees, etc., you can inquire further.