TDI · Poseidon rebreather
WA's Poseidon instruction specialists
Three TDI courses on the Poseidon Se7en and MkVI Discovery, from your first rebreather dive to Helitrox decompression at 45 m. Taught in Perth by an instructor who has been teaching on the Poseidon since 2014.

Why the Poseidon?
The Poseidon is a fully electronic closed-circuit rebreather designed to make rebreather diving approachable. It checks itself before every dive, manages its own oxygen setpoint, and tells you clearly when something needs attention.
The trade-off is that there are few people in Australia who teach it, and even fewer who are current. That's the gap I fill in WA.
Already diving a Se7en? My free Se7en error-code lookup explains what your handset is telling you.

The pathway
- Air Diluent: your first rebreather course. No decompression, to 30 m.
- Air Diluent Decompression: add planned decompression, to 40 m.
- Helitrox: add helium to your diluent, with decompression to 45 m.
Already an experienced decompression diver on open circuit? With Advanced Nitrox, Decompression Procedures, 50 logged dives and 5 decompression dives to 30 m or more, you can start at step 2 or 3. Each course page has the details.
Poseidon Se7en Air Diluent CCR
Your first rebreather course: no-decompression diving to 30 m on the Poseidon Se7en / MkVI Discovery.
$2,200 · 1:1 +$300TDI · Rebreather (Poseidon)Poseidon Se7en Air Diluent Decompression CCR
Staged decompression on the Poseidon, to 40 m with an air diluent.
$2,200 · 1:1 +$300TDI · Rebreather (Poseidon)Poseidon Se7en Helitrox CCR (45 m)
Helium in the loop: clearer heads and decompression diving to 45 m.
$2,500 · 1:1 +$300Owning versus hiring
Poseidon units can be hired for your course. I strongly recommend owning your own from the start: you learn the unit you'll actually dive, you set it up the way you like it, and you keep diving it the week after you certify. If you haven't bought yet, talk to me first and I'll give you an honest view.
Questions about rebreathers or the Poseidon? Read the FAQ →
Talk to me before you buy a rebreather
Whether you're months away or ready to book, a conversation costs nothing.