The quickest and easiest nitrox course. There are no tables to learn, but you’ll learn to program settings on your dive computer, as well as all the techniques and procedures you need to dive nitrox safely.

What you should have learned in open water, but probably didn’t.

The Advanced course expands your skills, and takes you deeper.

Complete the academic portion of your TDI Helitrox Diver certification entirely online. This eLearning-only option covers planned staged decompression diving theory to a maximum depth of 150 feet using enriched air nitrox and helium mixes with no greater than 35% helium content, at your own pace. Note: this listing covers online academics only. In-water training…

Complete the academic portion of your TDI Decompression Procedures Diver certification entirely online. This eLearning-only option covers planned staged decompression diving theory, dive planning, gas management, and emergency procedures for dives beyond no-decompression limits, at your own pace. Note: this listing covers online academics only. In-water training days are billed separately through our Technical Training…

Complete the academic portion of your TDI Advanced Nitrox Diver certification entirely online. This eLearning-only option covers gas blending theory, equivalent narcotic depth, oxygen exposure limits, and dive computer and table planning for enriched air diving from EAN21 through 100% oxygen, at your own pace. Note: this listing covers online academics only. In-water training days…

Be prepared to help in a breathing emergency with First Response Training International’s Oxygen Administration course. Learn how to safely and effectively administer emergency oxygen to a breathing or non-breathing person. OSHA and ILCOR compliant training designed for divers, lifeguards, and workplace responders. Prerequisites: Minimum age 18, 10 with parental consent What’s included: Online academics,…

Protect yourself and others with First Response Training International’s Bloodborne Pathogens course. Learn how bloodborne pathogens are transmitted, how to recognize situations where exposure may occur, and methods for reducing exposure risk. Meets OSHA requirements for workplace bloodborne pathogens training. Prerequisites: Minimum age 18, 10 with parental consent What’s included: Online academics, hands-on skills review,…

Keep your scuba tanks safe and compliant with TDI’s VIP Inspector (Visual Inspection Procedures) course. Learn to perform thorough visual inspections of scuba cylinders, identify corrosion and damage, and understand valve maintenance and cylinder standards. A must for divers who fill their own tanks or want a deeper understanding of cylinder safety. Prerequisites: Minimum age…

Cover more ground and see more of the underwater world with TDI’s Diver Propulsion Vehicle (DPV) course. You’ll learn to safely operate an underwater scooter for extended-range diving, including navigation, buddy towing, emergency procedures, and battery management. This course is perfect for divers who want to explore wrecks, walls, and large dive sites with greater…

TDI Nitrox Gas Blender Have you ever wondered how your nitrox cylinders are filled? Do you want a behind-the-scenes look at what makes a dive happen? Take the TDI Nitrox Gas Blender Course to discover how your cylinders get filled with nitrox! The TDI Nitrox Gas Blender Course will teach you to blend nitrox. This…

Become a Scuba Instructor, Add Specialties or Crossover to TDI/SDI