TDI Halcyon Symbios MOD1 CCR course
Air Diluent Deco Diver
Step into the future with the Halcyon Symbios chestmount CCR
Wireless technology, solid-state oxygen sensor in a very versatile rebreather
Did you pick a unit already? Check out the options for the best prices in the webshop here.
I highly recommend the full package with the HUD, the handset and the tank POD to get the full experience. If you are not familiar with the Symbios computers yet, it is a good idea to start using them before the course.
What is this course about?
Your first step will be to become a CCR Air Diluent Deco diver. This qualifies you to dive up to 40 m on CCR using air or nitrox as a diluent. With this rebreather you can choose your configuration of single tank, twinset or sidemount.
Prerequisites are:
- Advanced nitrox and Decompression procedures certification or equivalent
- Minimum 50 dives
- 18 years old
- Provide proof of at least 5 logged staged decompression dives to a minimum depth of
30 metres/100 feet. - Sidemount certification and experience (if you choose SM certification)
If you already have the 30m certificate:
- Minimum age 18.
- TDI Air Diluent CCR Diver certified or equivalent.
- Minimum of 30 hours and 30 dives on the Symbios CCR unit.
- Six months CCR diving experience.
Prerequisites for crossover
If completing a unit crossover, you must have at least 10 logged CCR dives in the last 12 months and certification from a TDI-recognised agency.
How long is the course?
The course is a minimum of 6 days (minimum 8 dives plus theory sessions). Extra days will be arranged if necessary.
Upgrade from Air Diluent diver certification takes 3-4 days. (5 dives)
Crossover course is also 3-4 days usually. (5 dives)
It is a very intense course, therefore a level of pre-study is necessary and expected. After all, it will leave you with more in-water time during the course!

Course price:
1400EUR (vat incl) plus learning materials and certification (110EUR)
It is possible to rent a unit for the duration of the course, however, you will need your own eventually anyway, mostly also due that places in the world where you can rent rebreather are very rare. Therefore, we highly suggest purchasing your unit before the course, and we will guide you all the way from choosing your personal configuration, delivery, unboxing and set up, making the unit yours. Rent is 100EUR/day including O2 and bailout gasses. Sorb is 9EUR/Kg
Crossover and upgrade course price depends on the duration of the course. See the pricelist here
Learn more about Symbios
Check out the User Manual
Contact me with any question


