Samaesan is a location renowned for some of the best Tec diving in Thailand. It features the deepest and most challenging technical dive sites in the Gulf of Thailand. Its close proximity to mainland means these deep technical dives are only 30 minutes away by boat and more easily accessible compared to others within the region making it an ideal training location for Technical Trimix diving.
Deep Technical Dive Sites
The area includes the renowned Samaesan Hole, which lies at depths of 85 to 100 meters. It is the deepest dive site in the Gulf of Thailand and is also ranked as one of the most extreme/deadly diving sites in the world. Ideal for hypoxic Trimix divers looking to test their skills.
The second deepest dive site in the Gulf of Thailand is Sharkfin Deep Drop, descending to 85 metres. The location features significantly richer marine biodiversity compared to the Samaesan Hole with fewer risks. It serves as an excellent environment for advanced Trimix training.
1/4 Mile Mouthpiece Drop is the third deepest dive site in the Gulf of Thailand at 75m. The seabed here is predominantly flat and sandy, adorned with soft corals that provide a vibrant habitat for shoals of fish. A great site for exploring on DPV.
Other deep technical dive sites in the area include Thunder Bowl (65m) and Narcosis Colosseum (50m), the 7th and 10th deepest technical dive sites in the Gulf of Thailand respectively. Both are easily accessible by boat and ideal for training.
Best Tec Diving in Samaesan
Best Tec Diving in Thailand
How to dive deep in Samaesan
Since the area is known for challenging dive conditions, it’s best to select guides or instructors familiar with it, such as myself or my colleagues at TecPattaya. Additionally, I would strongly recommend choosing a shop a with a dedicated Tec boat. This way you can get it a couple of decent deep dives and be back by early afternoon – without having recreational divers impact the schedule.