TDI & SDI Technical Programs
Technical Diving
Push beyond recreational limits with TDI's industry-leading technical certification programs and SDI specialty courses.
Core TDI Certifications
Go Beyond Recreational Limits
TDI Technical Diver
The TDI Technical Diver course is the gateway to the world of technical diving. You will learn to plan and execute dives using back-mounted double cylinders and a single decompression gas, manage complex dive profiles, and apply advanced gas switching techniques. The program covers the physics and physiology of technical diving, equipment configuration, emergency procedures, and systematic dive planning using TDI's proven frameworks. Upon completion you are certified to conduct technical dives to 45 meters using up to one decompression gas.
- Prerequisites: TDI Advanced Nitrox and Decompression Procedures, or equivalent agency certification
- Minimum age: 18 years
- Maximum depth: 45 m (150 ft)
- Includes: Back-mounted doubles, single deco gas, full dive planning
TDI Decompression Procedures
The TDI Decompression Procedures course teaches you to plan and execute dives that intentionally exceed no-decompression limits using a single decompression gas. You will master decompression theory, dive table and computer-based planning, gas switching protocols, and emergency management for decompression obligation situations. This course is frequently taken alongside TDI Advanced Nitrox as a combined program, providing a complete entry point into technical decompression diving.
- Prerequisites: TDI Advanced Nitrox (may be taken concurrently), minimum 100 logged dives
- Minimum age: 18 years
- Maximum depth: 45 m (150 ft)
- Includes: Decompression theory, gas planning, single deco gas
TDI Course Catalog
Build Your Technical Foundation
TDI Nitrox Diver
Learn to dive safely with enriched air nitrox mixtures up to 40% oxygen. Covers oxygen physiology, exposure limits, gas analysis, and dive planning with nitrox — the essential starting point for any technical diving pathway.
Inquire NowTDI Advanced Nitrox
Expand your gas flexibility by learning to use oxygen-enriched mixtures from 22% up to 100% O₂ during a dive. Covers blending theory, oxygen exposure management, equipment configuration, and multi-gas dive planning.
Inquire NowTDI Intro to Tech
A structured bridge between recreational and technical diving. You will be introduced to twinset configuration, primary and secondary regulators, buoyancy control in technical trim, and the foundational skills required before entering full technical training.
Inquire NowTDI Helitrox
Conduct dives to 45 meters with reduced narcosis by incorporating helium into your breathing mix. The TDI Helitrox course covers helium physiology, isobaric counter-diffusion, mix planning, and thermal considerations for cold-water technical dives.
Inquire NowSDI Programs
SDI Specialty Courses
SDI (Scuba Diving International) is TDI's recreational counterpart, offering specialty programs that complement your technical training and expand what you can do in the water.
SDI Solo Diving
Learn the philosophy, equipment configuration, and planning skills needed to dive safely as a self-sufficient, independent diver. Covers redundant equipment systems, self-rescue techniques, and responsible solo dive planning.
Inquire NowSDI Full Face Mask
Master the use of full face mask systems for enhanced thermal comfort, integrated underwater communication, and improved protection in low-visibility conditions. Covers setup, emergency procedures, and clearing techniques.
Inquire NowSDI Scubability
SDI's adaptive diving program opens the underwater world to individuals with physical disabilities. Learn to adapt equipment and techniques to create safe, enjoyable, and empowering dives for divers of all abilities.
Inquire NowReady to Go Technical?
Contact our team to discuss enrollment in any TDI or SDI course and find the right entry point for your technical diving journey.
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