Technical Diving (TEC) is the frontier of underwater exploration. It is diving that exceeds recreational limits, involving deep descents, overhead environments like shipwrecks and caves, and mandatory decompression using complex gas mixtures. It requires precision, discipline, and a mindset focused on safety and skill.

At Sri Lanka Diving Tours, we are proud to be the island’s primary destination for high-level technical training and expeditions. Whether you are looking to extend your bottom time or reach the legendary shipwrecks of the Indian Ocean, our experts provide the world-class training needed to survive and thrive in the deep.

Why Choose TEC Diving?

TEC diving is not just about going deeper; it’s about expanding your capability. It allows you to explore sites that are untouched by 99% of the world’s divers. By mastering specialized equipment and procedures, you reduce risks and unlock the “Silent World” in its most raw form.

• Extended Range: Dive safely beyond the 40-meter recreational limit.

• Overhead Mastery: Gain the skills to penetrate deep into massive shipwrecks and cave systems.

• Physiological Control: Learn to manage complex gas switches and decompression ceilings with absolute confidence.

The Holy Grail: HMS Hermes (Batticaloa)

Sri Lanka is home to one of the most iconic technical dive sites in the world: the HMS Hermes. As the world’s first purpose-built aircraft carrier, this WWII giant now rests off the coast of Batticaloa.

• The Depth: Sitting between 44m and 53m, she is a “TEC diver’s dream.”

• The Experience: Explore a 181-meter-long underwater museum, guarded by massive schools of fish and covered in black coral.

• Expert Access: Our very own Felician Fernando was part of the team that located this wreck, and Sri Lanka Diving Tours remains the leader in guiding divers to this historic war grave.

Advanced Gas Solutions: Trimix, Heli Air & Heliox

To explore these depths safely, specialized gases are used to manage nitrogen narcosis and oxygen toxicity. We provide full support for:

• Trimix: A blend of Helium, Oxygen, and Nitrogen. Helium is added to reduce narcosis, keeping your mind sharp and clear at extreme depths.

• Heli Air: A mixture of Helium and Air, providing a cost-effective way to reduce the effects of depth.

• Heliox: A high-end mix of Helium and Oxygen, often used for the deepest commercial and technical dives to eliminate nitrogen entirely.

PADI TecRec & Specialized Training

As a certified TEC Diving facility, we offer a structured path into the world of technical diving:

• PADI Tec 40, 45, & 50: Your foundation in entry-level technical diving.

• Full Trimix Certification: Master the art of deep exploration.

• Specialized Equipment: We provide twin tanks with isolator manifolds, stage bottles, and Nitrox/Trimix blending services.

Technical diving is the ultimate expression of intellectual and physical discipline. It is for those who seek the extraordinary and have the determination to master the skills required to get there.

Are you ready to redefine your limits? Contact our technical team today for more details on courses and HMS Hermes expedition dates.

• Start your deep-sea legacy here: srilanka-divingtours.com