Twinset Fundamentals

The Twinset Fundamentals intro to Tec course introduces students to diving on twin cylinders often referred to as twinsets or doubles and the knowledge and techniques required for the safe use of twinsets. The course includes knowledge development, equipment configuration workshop and dives.

Many divers reach a point in their diving careers when they realize that a single-cylinder scuba unit just doesn’t cut it for the sort of diving they’d like to do. Whether it’s concerns about equipment redundancy and safety or simply wanting to carry more gas so they can stay in the water longer, most adventurous divers are eventually drawn to multiple cylinders.

Twinset Fundamentals is a PADI Distinctive Specialty Course authored by Kiwidiver Tec Instructor Trainer Kevin Black. It was first launched in 2005 when the PADI Tec Deep course was a single 10 day intensive course taking students from recreational divers to full technical 50m divers. The course was designed as a stepping stone for those who found converting straight from recreational single tank diving to diving in full technical configuration in cold water and dry suits too much of a step.

The course is still taught today for those wanting a one day or two day intro to tec type experience where you learn correct technical configuration of twin cylinders and long hose gas sharing. It is ideal for someone wanting to get experience and practice diving on a twinset (double cylinders) prior to taking a PADI Tec 40 technical diving course.

On completion of the course you will be able to rent double cylinders for your recreational dives and dive within recreational limits in a technical configuration. This will give you the opportunity to practice things like shut down drills before starting your technical training.

PADI Discover Tec

The PADI Discover Tec Diver program from Kiwidiver is a one day course that exposes you to the equipment and technical dive equipment used by technical divers while discussing the considerations and goals of technical diving.

PADI Discover Tec includes a short confined water experience that allows you to give technical diving equipment a try. You get to wear all the standardized technical diving equipment and experience a few basic skills, such as out of air drills, regulator switching and possibly gas shutdown procedures.


  • 18 years
  • PADI Open Water Diver or equivalent
  • 10 logged dives
  • 1 day, 1 dive (confined or confined type conditions)


Twinset Fundamentals and PADI Discover Tec gallery