TDI Sidemount Diver

Booking Options
All courses bookable with a simple deposit.

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The certified diver looking to use a sidemount cylinder instead of the standard back mount unit.


  • SDI Open Water Scuba Diver or equivalent
  • Minimum age 18, 15 with parental consent


The course takes an in-depth look at all of the following and more:

  • Gas management utilizing independent cylinders
  • Cylinder options
  • Regulator options
  • Buoyancy compensator device (BCD)/harness options
  • Proper weighting
  • Hand signals
  • Problem-solving
  • Gas-sharing
  • Gas hemorhages
  • Shore water entries
  • Boat water entries
  • S-Drills (specific to sidemount)

Some of the required skills you will have to demonstrate include:

  • Plan dive.
  • Test and check all equipment (depth gauges, bottom timers/watches and computers).
  • Familiarization with area Descend to planned depth and not exceed any pre-planned limits.
  • Demonstrate the ability to safely manage gas in independent cylinders.
  • Monitor depth/time/air consumption, figure all times on slate.
  • Demonstrate ability to control buoyancy.
  • Attaching sidemount cylinders while out of water, on the surface standing on the bottom, on the surface in water too deep to stand, at depth.
  • Perform gas switches.
  • Perform safety stops.


Upon successful completion of this course, graduates may engage in sidemount diving activities without direct supervision, provided the following limits are adhered to:

  • Safety stops as appropriate
  • Planned dives do not exceed the diver’s current certification level

Also, the SDI Sidemount Diver certification counts towards a single specialty rating to achieve the SDI Advanced Diver Development program.


  • Perform all land drills and open water dive requirements safely and efficiently.
  • Demonstrate mature, sound judgment concerning dive planning and execution.
  • Log all dives.

Human Factors in Diving: The essentials

This 3-hour online class is a great starting point to find out why we make mistakes and how we can reduce the likelihood of an accident or adverse event occurring. We dive into decision making, situational awareness, communication and cooperation skills, and crucially, their interdependence. Using case studies and practical exercise, we bring the topic to life. Want to gain a quick but valuable insight? 

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To enrol onto this course, you will need to pay your deposit in advance so we can register and send you the course materials. You will need the materials to ensure you are prepared to start your training when you arrive at Techwise for your course. If this is what you want to do click DEPOSIT and then the BUY IT NOW button.

Frequently asked questions

If you are interested in technical diving and want to explore the many exciting and challenging adventures that it has to offer, there are a variety of organisations and programs you can choose from. Before getting certified, it is important to research the various types of technical diving available and choose a program that you feel comfortable with and that offers the specialties and equipment you need to safely and successfully explore the full range of dive possibilities.

The best way to compare these different technical diving agencies and choose the right one for you is to thoroughly research each organization's offerings and requirements, and to speak with other divers who have completed these training programs. Once you have an understanding of what each agency has to offer, you can make an informed decision about which program is right for you and start planning your next technical diving adventure!

When you’re getting into technical diving, there are a number of different pieces of gear that you’ll need to make sure that you have everything set up properly. Here is an outline of what is required by most technical diving agencies;.

Core Twinset Equipment

The fundamental equipment required for new technical divers is their wing, backplate and twinset regulators.

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