A wing “with a brain”: Halcyon pairs its BC with Symbios computers

A buoyancy compensator and a dive computer are two pieces of kit that are hard to imagine diving without today. We usually buy them separately, often from different manufacturers. Halcyon, an American equipment maker best known for wings and technical diving gear, has decided to put them into one offer and named it “BC with a brain”. InDEPTH magazine wrote about it in September 2026. Below we explain what it is about, what the bundle includes and what to check before you decide that your own BC needs a “brain” too.

The basics first: what is a BC and what is a wing?

BC (short for buoyancy compensator, colloquially a “jacket”) is the piece of equipment you use to adjust your buoyancy, that is, whether you sink, rise or hover in place underwater. Buoyancy changes during a dive: a wetsuit or dry suit compresses with depth, and the cylinder gets lighter as you use up the gas in it. That is why you need a bladder to which you can add air or from which you can release it.

This is done with an inflator: a button at the end of a corrugated hose by your left shoulder. One button lets gas from the cylinder into the bladder, the other releases it. You decide when and how much.

A wing is a type of BC popular in technical diving. The buoyancy bladder sits only on the back, between you and the cylinder, and the whole system has several parts: a backplate (a rigid base to which you attach one or more cylinders), a harness made of webbing and the bladder itself. This makes it easier to hold a horizontal position underwater (trim), and the whole setup can be fitted to you. Halcyon calls such sets BC systems, and it is when choosing one of these systems that the new option appears.

What exactly did Halcyon offer?

According to InDEPTH, the offer was that a diver buying a complete Halcyon BC system together with a Symbios computer or a computer bundle received 15% off the combined list price of both items. The promotion was to last a month and ended on 15 October 2026. If you are reading this later, the terms may have changed, so it is best to check the current offer with a Halcyon dealer.

More interesting than the discount itself, though, is the idea: the BC and the computer stop being two independent purchases and become one set that you configure together. In the wing configurator on the manufacturer’s website there is a section titled “Your BC just got a brain”.

What is in the Symbios family?

Symbios is the name of a whole family of devices that are meant to work together. The offer described by InDEPTH has four elements.

Symbios Blue (wrist computer). A computer with a display whose look you can customise, and with built-in training tools. You can choose it as the single computer for a BC system.

Symbios Silver (wrist computer). A model for more complex setups. It can connect wirelessly to the Symbios rebreather, a unit in which the exhaled gas does not escape into the water but circulates in a closed loop, is cleaned of carbon dioxide and topped up with oxygen.

Symbios HUD (display by the mask). A HUD (head-up display) is a small screen mounted by the mask. It shows dive data in your field of view, so you do not have to look at your wrist. According to the article, the HUD can work as part of the Symbios system or on its own, as a separate dive computer.

Tank Pod (cylinder sensor). A unit that, according to InDEPTH, provides information on cylinder pressure and on trim. It comes in the bundles: Silver + Tank Pod, HUD + Tank Pod, or all three items together.

The article does not give technical details of the individual devices (for example decompression algorithms, battery life or communication range). If these parameters matter to you, check them in the manufacturer’s documentation.

How did ordering work?

The process described by InDEPTH has three steps:

1. On the Halcyon website you choose a BC system and open its configurator.
2. In the “Your BC just got a brain” section you add a Symbios computer or a bundle. The discount was shown straight away in the price calculation. You can also choose colours and accessories.
3. You save the configuration to a wish list and send it to a dealer, or print a PDF with a QR code and take it to your local Halcyon shop.

So the purchase goes through an authorised dealer, and the website is used for planning the set.

What does it mean for a diver?

The slogan “BC with a brain” sounds as if the wing looked after buoyancy by itself. The article does not say that. What it means is that you choose a computer from one family of devices to go with the wing. You still control buoyancy yourself, with the inflator, and that is a skill no computer will take over for you.

Advantages of this approach:

• One place, one configuration. You plan the wing and the electronics together, with one dealer.
• Information closer to your eyes. The HUD shows data in your field of view. This is convenient especially when your hands are busy, for example with a line, a torch or a stage cylinder.
• Cylinder pressure on the computer. Thanks to the cylinder sensor you do not need to reach for a pressure gauge, and you also get trim information.
• A path forward. The Silver model connects to the Symbios rebreather, so for someone thinking about diving a rebreather, this is kit that can “move up” with them to the next stage.

What to keep in mind:

• Electronics can fail. Battery, sensor, communication: in technical diving the rule is to have a backup. A pressure gauge, a dive plan and a second computer still make sense.
• A product family also ties you to one brand. Devices from one family work well together, but replacing one element with another manufacturer’s equipment may not be simple.
• A computer does not replace training. The best display will show you numbers, but you have to know what to do with them: when to end the dive, how to react to a failure, how to plan decompression.
• The discount was limited in time, and the article does not give specific prices or say in which countries the offer applied.

Glossary

• BC (buoyancy compensator, jacket): a piece of equipment for adjusting buoyancy underwater.
• Wing: a type of BC with the bladder only on the back, attached to a backplate and harness; standard in technical diving.
• Buoyancy: whether you sink, rise or stay in place underwater.
• Inflator: a valve with two buttons on the BC hose, for letting gas into the bladder and releasing it.
• Trim: the position of your body underwater; in technical diving we aim for a horizontal position.
• Dive computer: a device that continuously calculates depth, time, no-decompression limits and stops.
• HUD (head-up display): a small display by the mask that shows data in your field of view.
• Tank Pod / pressure transmitter: a sensor screwed onto the cylinder that passes the gas pressure to the computer.
• Sensor: an element that measures some quantity, for example cylinder pressure or depth, and passes it to the electronics.
• Rebreather: a unit in which the exhaled gas circulates in a closed loop, is cleaned of carbon dioxide and topped up with oxygen.
• eCCR: an electronic closed-circuit rebreather, in which electronics control the amount of oxygen in the loop.
• Product family: a range of devices from one manufacturer designed to work together.
• Stage cylinder: an additional cylinder carried on the side, usually with decompression gas.

Want to dive deeper and more safely?

Choosing a wing, working with several cylinders, planning decompression and using a computer wisely are the basis of technical diving courses. At Long Deco we teach this step by step:

• Nitrox course: the first step to longer dives with less nitrogen loading,
• PADI Tec 40: an entry to decompression diving,
• PADI Tec 45 and Tec 50: deeper dives and several decompression gases,
• PADI Tec Trimix 65 and Tec Trimix Diver: dives below 50 m with helium.

Write to us and we will help you choose a course and equipment to suit your experience.

Source: Stratis Kas, Halcyon Launches Bundle Offer: “BC with a Brain”, InDEPTH Magazine, 22 September 2026. indepthmag.com/halcyon-bc-with-a-brain-symbios-offer

Graphics prepared by Long Deco based on the article. This text is for information only, is not an advertisement or a purchase recommendation, and does not replace training or the manufacturer’s instructions.