TDI Technical Sidemount

Who is it for

The TDI Sidemount Diver Course is the ideal specialty for any diver wishing to use this increasingly popular equipment configuration; either as a stand-alone course OR in conjunction with one of TDI’s other open circuit technical specialties such as Decompression Procedures, Extended Range, Trimix, Advanced Trimix, and Advanced Wreck. If this course is combined, the requirements for BOTH courses must be met. The TDI Sidemount Diver course teaches students how to utilize side-mounted primary cylinders as an alternative to the traditional back-mounted method

What you can expect to learn:


The TDI Sidemount Diver Course takes an in-depth look at all of the following


  • Gas matching procedures to include dissimilar volumes
  • Gas management utilizing independent cylinders
  • Psychological considerations of technical diving
  • Equipment considerations including:
  • Cylinder options
  • Regulator options
  • BCD/harness options
  • Proper weighting
  • Equipment configurations
  • Communication (light and hand signals)
  • Problem solving in a sidemount configuration
  • Diving in tight or confined spaces
  • Conservation
  • Water entries/exits
  • S-drills specific to sidemount diving

Course Skills

  • Propulsion techniques such as the frog kick, modified frog kick, modified flutter kick, backwards kick, helicopter turns, and hand pulling if appropriate for the environment.
  • Demonstrate adequate buoyancy control; ability to hover at a fixed position in water column without moving hands or feet
  • Demonstrate adequate trim; ability to maintain proper position during the descent, bottom, and ascent portion of the dive
  • Perform the following exercises maintaining trim and buoyancy:
    • Unclipping and attaching sidemount cylinders
    • Perform gas switches with and without a mask
    • Demonstrate the ability to safely manage gas in independent cylinders
    • Demonstrate conservation, awareness, and back referencing techniques
    • Deploy a lift bag

What’s Included

The course fee covers instructional time, manual, use of facilities including pool. Students are expected to cover boat and accommodation costs but we have packages available. Only after the successful completion of the course do you pay your certification fee – “you pay for training – you earn the certification”

Back to Main Menue



Advanced Diver or equivalent, Nitrox recommended, minimum of 40 dives

Student to Instructor Ratio

4:1 (maximum)

No. Sessions

2 x theory; 1 pool practical kit setup session; 3 x open water dives.


On joining we will send you a kit list, full kit can be rented for the course

Related Courses

Wreck & Advanced Wreck

Cavern, Cave

Advanced Nitrox

Decompression Procedures

TEC 40, 45 & TEC 50

Foundations of Safer Diving

I’ve been diving for over 20 years, including instructing and Matt was able to bring my diving skills and knowledge to a completely new level

Kirk K, Kerry

Rec Diver