Halcyon Symbios Limited Edition Dive Computer (30th Anniversary)

30 Years of Exploration. Limited to 300 Worldwide.

Celebrate three decades of underwater excellence with the Halcyon Symbios 'Silver' Limited Edition Dive Computer. Restricted to just 300 individually numbered units globally, this exclusive release builds upon the powerful Symbios Silver platform to create a truly collectible piece of technical diving history. As a central communication hub for your diving ecosystem, it supports both open circuit and closed-circuit rebreather (CCR) diving. Whether navigating complex wrecks or deep cave systems, it helps you track your dive, your team, and your decompression in real-time.

Exclusive 30th Anniversary Design

The Limited Edition Symbios stands out with exclusive design details crafted for the Halcyon purist. The display glass features Halcyon’s 30th Anniversary logo superimposed over a subtle contour-line pattern. Distinctive blue screws frame the display, adding a signature color accent against the sleek black housing. Furthermore, each computer carries its own unique X/300 marking to identify its place in this highly exclusive production run, and features a distinctive wrist band.

Unmatched Readability & Ecosystem Connectivity

Engineered for clarity in any environment, the wireless, ultra-slim handset features a 2.4" full-color transflective display that remains highly readable even in direct sunlight without the need for a backlight. Beyond monitoring your own data, the Symbios connects wirelessly to tank pods, supported rebreathers, and an expanding ecosystem. It even offers a dedicated Buddy Screen to display your dive partner's critical data like PO₂ and tank pressure, enhancing team connectivity.

CCR Ready & Deep-Rated Hardware

The Limited Edition features upgraded depth-resistant button springs specifically rated to 150 m. For rebreather divers, it delivers seamless integration via wireless CCR pods, simplified PO₂ displays, and dual Time-to-Surface (TTS) calculations for both CCR and bailout modes. A single-action bailout control significantly reduces task loading during emergencies. Additionally, an integrated trim indicator helps you monitor your exact position in the water, while the Gradient Factor chart visually displays leading tissue compartments.

⚙️ Core Specifications

• Limited Edition Features: Unique X/300 numbering, 30th Anniversary contour glass design, signature blue display screws, distinctive band, and upgraded 150m depth-resistant buttons.
• Dive Modes: Multi-gas, OC, fixed/integrated CCR, Sidemount, Bottom Timer (Gauge), and Buddy Screen.
• Gas Capability: Up to 5 Open Circuit / Closed Circuit gases. Pre-programmed gas library for faster setup.
• Algorithm: ZHL16-C (Bühlmann) with customizable Gradient Factors.
• Display: 2.4” Transflective full-color display (320 x 240 resolution) readable in direct sunlight.
• Dimensions: 94.4 x 63 x 19.8 mm (Ultra-slim, glove-friendly profile).
• Battery: Rechargeable Li-Ion (up to 25 hours of operation during diving, 1 year standby). Features alerts and vibration notifications.
• Memory: 32 GB internal storage (logs data every 5 seconds).
• Max Depth Rating: 120m / 394 ft (Button springs upgraded to 150m rating).