Level
Advanced
Course
Duration
1.5
Days
Max Depth
40
Meters
Cost
฿8,000
Thai Baht
Perfect for certified divers wanting to enhance their underwater experiences, the SSI Deep Diving Specialty Course offers a comprehensive exploration of deeper diving. This program includes theoretical lessons combined with three supervised deep dives, where you’ll learn critical safety protocols, dive planning, and techniques necessary for deeper exploration. Upon completion, you’ll be certified to dive down to 40 meters, opening the door to exhilarating deep-water sites and encounters with unique marine life rarely seen at shallower depths.
09:00-11:00 Deep diving academic session
11:00-11:30 Air consumption check and dive planning
11:30-12:30 Break
12:30-17:00 Deep dives 1+2 (max. 30m)
17:00-17:30 Debrief
Unlock the mysteries of the deep! This course equips certified divers to explore depths up to 40 meters safely, revealing new dive sites and unique marine encounters in Koh Tao’s captivating waters.




Had a blast, after a long time not diving booked 3 days of morning diving trips. The staff was very welcoming and professional. A lot of thanks to Peter, Becky, Anna and Lukas.
If you are looking to dive and have a good time look no further. I recently earned my open water and advanced open water. It was truly an amazing experience! Upon arriving I was welcomed with a great sense of community and as the course went on I could truly see the quality of training you receive from the good time staff. The instructors at Goodtime are fantastic they breakdown the complexities of diving and give both textbook examples and techniques from their own diving experience. They never rush a student and never make you feel dumb for asking silly questions. These instructors have a great sense of leadership and a keen eye for safety. The front desk staff are super helpful and some of the nicest people you may ever meet. I cannot thank them enough for answering any and all questions. After deciding to purchase my own mask they helped me find the right fit and even had it delivered in about 20 minutes so I could have it for my next dive! A huge shoutout to my underwater family Max, Tim, Lydia, Ana, Lucas, Logan, Charlie, and Liv Also Beth for being an amazing underwater photographer!!!
I had a wonderful time with Goodtime, we went climbing there with Charlie (real routes! I advise it being a climber) and had our open water dive with Lydia, Livia and Andrea. I was so happy with the course that I went to the Advanced right after! Team is amazing, I feel lucky we had such good instructors, with good vibes and the well-applied pedagogy 🙏
Thank you Eduardo for the amazing dive. I can only recommend this diving school. Professional, very nice atmosphere and really welcoming staff
I went fun diving with Goodtime and i highly recommend them! They’re safe, professional and fun. Daan and Ana made the morning a lot of fun
10/10! Would recommend Goodtime Adventures to anyone looking to learn to dive. Daan and liv took us out in 5 dives and got us our open water certification. Easy to learn from and also fun aswell. 🙏