SubseaExamPrep
Shop

Everything in one place

Exam packages, study books and money-saving bundles for the ADS, BDS and LST. One-off payments, no subscriptions.

Opening soon. Full packages and books are nearly ready. Tap any product and we'll email you the moment it opens. Free practice questions are live now.
Founding member prices. The first 75 members lock in today's prices. After that, prices go up 30%. 75 of 75 places left
Exam packagesBooksBundles

Exam packages

Full question bank, timed mocks and a study plan for your exam.

LST exam prep

Life Support Technician

$125 $162 one-off · 6 months
  • 759 practice questions with worked answers
  • Unlimited timed mocks: Physics 20 · Physiology 20 · Chamber practices 40
  • Revision notes, calculators and document library
  • Progress tracking and a study plan
Coming soon: notify meTry 15 questions free
Most popular
ADS exam prep

Air Diving Supervisor

$200 $260 one-off · 6 months
  • 928 practice questions with worked answers
  • Unlimited timed mocks: Physics 25 · Physiology 25 · Working practices 50
  • Revision notes, calculators and document library
  • Progress tracking and a study plan
Coming soon: notify meTry 15 questions free
BDS exam prep

Bell Diving Supervisor

$350 $455 one-off · 6 months
  • 1,330 practice questions with worked answers
  • Unlimited timed mocks: Physics 20 · Physiology 20 · Chamber practices 20 · Bell operations 40
  • Revision notes, calculators and document library
  • Progress tracking and a study plan
Coming soon: notify meTry 15 questions free

Study books

Plain-English books with worked examples, exam traps and a practice paper in each. PDF, yours to keep.

SUBSEA EXAM PREP · BOOK 1Physics and GasWritten by David Marshall

Book 1: Physics and Gas

For ADS · BDS · LST · PDF

Every calculation on the exam, worked step by step in metric and imperial.

$39 $51
Notify me
SUBSEA EXAM PREP · BOOK 2Diving Physiology, Medicine and First AidWritten by David Marshall

Book 2: Diving Physiology, Medicine and First Aid

For ADS · BDS · LST · PDF

What pressure and gas do to the body, and what to do when it goes wrong.

$39 $51
Notify me
SUBSEA EXAM PREP · BOOK 3Air Diving OperationsWritten by David Marshall

Book 3: Air Diving Operations

For ADS · PDF

Working practices for the air diving supervisor.

$39 $51
Notify me
SUBSEA EXAM PREP · BOOK 4Saturation, Bell and Chamber OperationsWritten by David Marshall

Book 4: Saturation, Bell and Chamber Operations

For BDS · LST · PDF

Bell, chamber and life support practices for the BDS and LST.

$39 $51
Notify me

Bundles

Your exam package plus its books, or the full library.

LST bundle

Life Support Technician + 3 books

$174 $226

The LST exam package plus the three books that cover it. Save $68 on the books.

Book 1Book 2Book 4
Coming soon: notify me
ADS bundle

Air Diving Supervisor + 3 books

$249 $324

The ADS exam package plus the three books that cover it. Save $68 on the books.

Book 1Book 2Book 3
Coming soon: notify me
BDS bundle

Bell Diving Supervisor + 3 books

$399 $519

The BDS exam package plus the three books that cover it. Save $68 on the books.

Book 1Book 2Book 4
Coming soon: notify me
Best value
All four books

The complete library

$100 $130

All four books for $100 instead of $156. Every area of the ADS, BDS and LST exams.

Book 1Book 2Book 3Book 4
Coming soon: notify me