Training for underwater construction jobs performing inspection, installation, maintenance, and recovery as an Air/Mixed Gas Surface Supplied Diver, including both topside and underwater wet welding training.

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The International Diving Institute offers a 16 week, 640 hour comprehensive program which covers the training you need to work as a commercial diver and underwater welder. At IDI we focus on the quality and safety of the training we give our students. We keep our class sizes small to allow for more direct interaction between students and instructors.



The admin staff are the most incredible to work with throughout the process. The instructors have a passion for diving take the industry seriously. If you love a challenge and have great work ethic, this is the premier choice. And if you are a veteran, this school environment will have a familiar feel.

—Amber H.


“Great place to be, exceptional  staff AND INSTRUCTORS”

I can’t say enough about how great this place really is, they really go above and beyond effortlessly because they’re all investing interest in producing better divers overall. I highly recommend this school for anyone interested in becoming a commercial diver and welder.

—Mike H.


“An amazing school with  outstanding instructors”

I’ve attended the air/mixed gas course, and i am currently enrolled in the underwater welding course. From the moment you show up, they have everyday planned out and ready for students to challenge themselves…

—Corey B.

Entry level requirements
or high school
a dive
Diving Physics
The laws of physics that directly affect the underwater diver and their equipment.
Diving Physiology & Medicine
The physiological basis for safe diving practices, as well as the medical sciences and clinical conditions associated with diving.
Decompression & Treatment Tables
The diagnosis and treatment of diving disorders with recompression therapy and how to treat decompression sickness.
Hyperbaric Chamber Operations
Maintain and operate hyperbaric chambers that simulate the hyperbaric conditions under the sea.
Underwater Tools & Equipment
A wide range of commercial diving tools designed for a variety of underwater applications.
Diesel Engines & Compressors
How breathing air compressors combined with diesel engines deliver clean air for a safe diving experience.
Topside Welding & Cutting
The equipment, safety practices and applications for topside welding and cutting.
Underwater Welding & Cutting • CORE COMPONENT •
The equipment, safety practices and applications for underwater welding and cutting.
Dive Operations Planning
Plan and document the process of underwater diving operations, ensuring safe completion and achievement of goals.
Offshore Oilfield Diving
Barge support, rig support, hand jetting, oil & gas field maintenance/repair, pipeline construction/repair, pipe jetting and more.
Inland Diving
The full range of services, equipment and safety practices for helping municipalities, contractors, residential customers and more.
Mixed Gas Diving
: In order to avoid nitrogen narcosis, decompression and oxygen toxicity, the diver breathes a mixture other than air or nitrox.
Ship & Sea Salvage Operations
: Recovering, towing, re-floating, patching and repairing ships, cargo and property involved in maritime casualty.
Ships Husbandry
Legal definitions and applications of a ship’s husband, or owner of a ship with invested authority to make various decisions.
Hydraulics & Pneumatics
Advantages, disadvantages and applications of hydraulic and pneumatic actuators.
Dive Hat Mainenance
Disassemble, clean, disinfect and inspect commercial diving hats.
Get in the water and begin taking your first breaths through your helmet. Then start learning how to complete mid-water projects.
Seamanship & Survival
Tips, best practices and equipment needed for survival at sea.

IDI is a member of the Association of Diving Contractors International (ADCI) and trains to the standards published by the Association of Commercial Diving Educators (ACDE) and the American National Standards Institute (ANSI).


Commercial diver jobs have remained steady even during economic downturns. Many diving jobs are related to infrastructure. IDI maintains an active employment assistance program for our students. Some examples of Commercial Diver Jobs include, but are not limited to, the following:

  • Offshore Deep Sea Diving
  • Bridge Structural Inspection
  • Demolition and Salvage
  • Pipeline Construction
  • Nuclear Power Plant Maintenance
  • Dam Inspection and Maintenance
  • Offshore and Inland NDT Inspection
  • Platform Installation and Removal
  • Television and Filmmaking
  • Underwater Civil Engineer
  • Offshore Wind Farm Installation
  • Fish Farms

View 2020 Class Schedule View 2021 Class Schedule 

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Please note

  • The International Diving Institute is permanently closed.   The final class completed August 26, 2021
  • Please note for transcript and/or education verification inquiries please contact the South Carolina Commission on Higher Education at 803-737-2260 or visit