Pass your IMCA diving supervisor or LST exam first time.

Over 1,200 original questions and timed mock exams built around the current IMCA guidance documents, written with a certified bell diving supervisor with more than 20 years offshore.

Choose your exam   Try free questions

Choose your exam

Pay once per exam. No subscription. Every question is tied to the current revision of the IMCA or DMAC document it comes from.

LST

Life Support Technician

$125
One-off payment, 12 months' access
  • 694 practice questions
  • Timed mock exams in the real format: Physics 20, Physiology 20, Chamber practices 40
  • 120 minutes, scored per area like the real exam
  • Worked answers with the source document for every question
Get LST access Try 15 free
ADS

Air Diving Supervisor

$200
One-off payment, 12 months' access
  • 862 practice questions
  • Timed mock exams in the real format: Physics 25, Physiology 25, Working practices 50
  • 150 minutes, scored per area like the real exam
  • Worked answers with the source document for every question
Get ADS access Try 15 free
BDS

Bell Diving Supervisor

$350
One-off payment, 12 months' access
  • 1,265 practice questions
  • Timed mock exams in the real format: Physics 20, Physiology 20, Chamber practices 20, Bell operations 40
  • 150 minutes, scored per area like the real exam
  • Worked answers with the source document for every question
Get BDS access Try 15 free

How it works

1. Practise by area

Work through physics, physiology, working practices, chamber practices and bell operations one question at a time. See the right answer, the working and the source straight away.

2. Sit timed mocks

Each mock is drawn fresh from the bank in the same structure and time limit as the real exam, one question on screen, with a built-in calculator.

3. Know you're ready

Results are scored like the real thing: 75% overall and at least 70% in every area. Your weak areas show up straight away, so you know where to spend your time.

Built from the documents you'll be examined on

D022 Guidance for diving supervisors, D014, D050, D024, D018, D010 and over 40 more IMCA and DMAC documents, checked against their current revisions. The physics questions use the same methods as D022 Chapter 2, with fresh numbers.

What candidates find hardest
  • Gas mixing and partial pressure sums under time pressure
  • Gauge versus absolute pressure traps
  • Test intervals and minimum gas quantities
  • Old figures from out-of-date notes that the current documents have changed