Halcyon Australia

𝐇𝐚𝐥𝐜𝐲𝐨𝐧 𝐖𝐚𝐬 𝐓𝐡𝐞𝐫𝐞

In the early 2000s, I became interested in technical diving. Living in Sydney, we are fortunate to have a variety of wrecks in the 45m to 80m range.
This offered me the opportunity to push my diving further and further my career as a technical diving instructor.

I have always approached this type of diving with the mindset of using the best possible equipment on the market, built by people at the forefront of technical and cave diving. This is what led me to Halcyon Dive Systems and my first piece of Halcyon equipment in 2001: an Explorer 40 wing and backplate. I was fascinated by the dives where the equipment was being used — extreme deep ocean diving and cave exploration. I knew I had found my place.

Since then, I have been lucky enough to have a successful career as a technical diving instructor and to be part of many exploration projects around the world, from the first cave diving exploration in China to numerous deep wreck diving projects across the globe — from the freezing temperatures of the Baltic Sea to the tropical and temperate waters of the South Pacific.
While the equipment has evolved over the years, one thing within Halcyon has not: the drive for innovation and performance-driven products.

One standout in the evolution of Halcyon equipment is the Symbios CCR. In 2009, I learned to dive the Halcyon RB80, my first rebreather. It was a time when eCCRs were evolving, and the non-electronic RB80 was very appealing to me.

Fast forward to today and the newly released Halcyon Symbios eCCR. Its lightweight and compact size is fantastic for travel, and its simplistic design is packed with technology, including the world’s first wireless communication system between the rebreather, HUD, and handset.

On this 30th anniversary of Halcyon, the release of the Symbios suite of products highlights that the brand remains true to its core values and marks the beginning of the next 30 years. Happy Birthday Halcyon!

Liam Allen

𝐋𝐀𝐒𝐓 𝐂𝐀𝐋𝐋

𝐒𝐲𝐦𝐛𝐢𝐨𝐬 𝐈𝐧𝐬𝐭𝐫𝐮𝐜𝐭𝐨𝐫 𝐎𝐟𝐟𝐞𝐫

Time is running out to take advantage of the 2026 Symbios Instructor Offer.

Available to active dive instructors, the offer provides special pricing on selected Symbios dive computers and bundles — including the Silver Handset, Blue Handset, HUD and Tank Pod combinations.

𝐓𝐡𝐞 𝐨𝐟𝐟𝐞𝐫 𝐞𝐧𝐝𝐬 𝐀𝐮𝐠𝐮𝐬𝐭 𝟑𝟏, 𝟐𝟎𝟐𝟔.

If you’ve been considering adding Symbios to your diving, now is the time.

🌐 Go to halcyon.net and 𝐚𝐩𝐩𝐥𝐲 𝐧𝐨𝐰!

Are you one the Halcyon Symbios Divers?

Join our Symbios Divers Social Event and dive with other Symbior CCR Divers!

🗓 12-13 September 2026

📌 Manta Lodge and Scuba Centre, Stradbroke Island

We're looking forward to diving with you 💦

Thought of trying our Symbios CCR?
We will be running try dives at Go Diving Show.
Book your slot now👇 https://booking.appointy.com/en-US/sditrydivepool/bookings/calendar?sr=1235554

Tech Dive Shorts💦

Stay comfortable and organized underwater with Halcyon Tech Dive Shorts. These shorts are designed to be worn over a wetsuit or alone in warm water, offering comfort, versatility, and storage for essential gear.

Made from rugged yet flexible material, these shorts fit snugly without restricting movement. The waistband strap is adjustable. These shorts stay in place throughout your dive, even when loaded with accessories.

🌐 Go to halcyon.net and find out more🤙

Enhanced CCR Performance

Several improvements have been made to increase system performance and reliability:
• The Dynamic Setpoint can now be configured up to 1.3 bar
• Greenflash optode sensor readout and stability have been further improved
• The exact reason for a sensor calibration failure is now displayed, identifying both the affected sensor and the cause of the failure
• Intelligent Ascent Setpoint Control

A new intelligent ascent algorithm automatically adjusts the selected setpoint when the requested value cannot be achieved at the current depth. For example, if a diver ascends while still using a high setpoint, the system will automatically provide the best achievable setpoint for that depth without requiring userintervention.

Unlike systems that continuously inject oxygen or switch to a lower setpoint only at predefined depths, Symbios dynamically adapts throughout the ascent to provide optimal performance.

🌐 Go to halcyon.net and read more about the 𝐒𝐲𝐦𝐛𝐢𝐨𝐬 𝐅𝐢𝐫𝐦𝐰𝐚𝐫𝐞 𝐔𝐩𝐝𝐚𝐭𝐞 𝐅𝐖 𝐕𝟐.𝟑𝟔.𝟏𝟏

𝐒𝐲𝐦𝐛𝐢𝐨𝐬 𝐂𝐂𝐑 𝐇𝐞𝐚𝐝

𝐄𝐱𝐩𝐚𝐧𝐝𝐞𝐝 𝐁𝐥𝐮𝐞𝐭𝐨𝐨𝐭𝐡 𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐯𝐢𝐭𝐲 𝐚𝐧𝐝 𝐀𝐩𝐩 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧

The Symbios CCR Head now communicates directly with the Halcyon App via Bluetooth, allowing users to:

- View complete CCR data in the app.
- Modify CCR settings, including setpoints, sensor type, and unit ID.
- Access sensor calibration information.
- Transfer CCR data directly into the app's electronic checklist.
- This seamless integration further strengthens the Symbios ecosystem by simplifying setup, configuration, and pre-dive procedures.
- 𝐀𝐥𝐥 𝐮𝐬𝐞𝐫𝐬 must update their CCR firmware via the app or manually using the USB cable.

🌐Go to halcyon.net to read more about the 𝐒𝐲𝐦𝐛𝐢𝐨𝐬 𝐅𝐢𝐫𝐦𝐰𝐚𝐫𝐞 𝐔𝐩𝐝𝐚𝐭𝐞 𝐅𝐖 𝐕𝟐.𝟑𝟔.𝟏𝟏

📸 𝐀𝐫𝐤𝐚𝐝𝐢𝐮𝐬𝐳 𝐒𝐫𝐞𝐛𝐧𝐢𝐤 /Diving instructor and photographer/