01Learn it
Short lessons in a clear order. Understand why the sum works before you drill it. Diagrams, worked examples and a quick check at the end of each one.
Why it works. You cannot recall what you never took in.
TADS is the IMCA Trainee Air Diving Supervisor course. The ADS is the final IMCA Air Diving Supervisor exam. TADSprep gets you ready for both, then stays with you offshore as your reference manual.
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TADSprep covers every step, from the classroom to dive control.

Trainee Air Diving Supervisor. Learn the theory: physics, physiology, gas, chambers, emergencies and IMCA rules.
Supervise real dives under a qualified supervisor. Build the experience and get it signed off.
The final Air Diving Supervisor exam. Physics, physiology and working practices, against the clock.
In the chair. TADSprep stays with you as the reference manual for every dive.
TADSprep is an online study platform for divers stepping up to supervise. It covers the theory for the TADS course and the ADS exam: gas laws, gas planning, physiology, chambers, emergency plans, DP and the IMCA rules that hold it all together. Study on your phone, offshore or at home.
One idea at a time. Animated diagrams with a voice-over, so a hard topic makes sense the first time.
Every gas and pressure sum laid out one line at a time. Same units and formulas as the IMCA documents.
One question per screen. Scored straight away, with the working shown for every answer.
Lessons, practice tests and flashcards use the same module numbers. Each part feeds the other two. It is a loop, not a line.
01Short lessons in a clear order. Understand why the sum works before you drill it. Diagrams, worked examples and a quick check at the end of each one.
Why it works. You cannot recall what you never took in.
02Close the book and answer exam-style questions. The first run is not a test. It is a diagnostic that shows exactly where the gaps are.
Why it works. Pulling an answer out of memory builds recall. Re-reading does not.
03Drill the gaps the tests found. Fixed values, formulas and IMCA rules in short sessions, right up to exam day. Nothing new here, just cementing what is already in.
Why it works. Spaced reps move it from short-term to long-term memory.
Learn it → Drill it → Lock it in → Next module
Passing is not the end. In dive control the question comes up mid-shift, and the answer has to be right. TADSprep is the manual on your phone.
Lessons, formulas and fixed values, quick to find on a phone in dive control.
Gas, depth and time sums worked out line by line, so the answer can be checked.
The guidance a supervisor works to, explained in plain words.
Updated when IMCA guidance changes, so you stay current on every rotation.
This is not the syllabus three times. It is one module three ways, then on to the next.
One module, all the way through. Slow, with gaps everywhere. That is normal. Finding the gaps is the point.
Same module, a few days later. Quicker. The weak spots shrink and the guessing stops.
Each lap runs faster. The sums start to come without thinking, which is what the exam clock needs.
Run it across a rotation, not one weekend cram. Twenty minutes on a weather day still counts.
Built around the TADS syllabus in IMCA D 071 and the diving physics in IMCA D 022.
Sean FraenkelAir and Saturation Diver · 25+ years offshore · TADS · CSWIP 3.4u · Founder of NDTPrep
“TADSprep runs on the same study system I built for NDTPrep, to help divers pass their CSWIP inspection exams. Learn it, drill it, lock it in.
When my own TADS course came up, I used that system to study for it, and I passed. Now I am using it to get ready for the final IMCA Air Diving Supervisor exam.
TADSprep is that system, opened up to every diver on the same path.”
Built by a diver, for divers.
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Watch your inbox. The early-access email comes from support@tadsprep.com.