SCR Diving (HORIZON)
Exploring the Deep - Diving with the Mares Horizon SCR
For divers looking to explore the depths of the ocean, the right equipment can make all the difference. In this blog post, we will take a closer look at the Mares Horizon Semi-Closed Rebreather (SCR), exploring its unique features and capabilities, and offering insights and advice for divers interested in trying it out.
What is the Mares Horizon SCR?
The Mares Horizon SCR is a semi-closed rebreather system that uses nitrox breathing gas mixtures. Unlike traditional open-circuit scuba systems, which release exhaled gas into the water, the Horizon SCR recirculates the gas within the system, removing carbon dioxide and replenishing the nitrox gas supply as needed.
This system is much more efficient and can provide longer dive times compared to open-circuit systems.
One of the most distinctive features of the Mares Horizon SCR is its dive controller, which is plugged directly into the unit. This computer provides real-time monitoring of all the critical systems, including oxygen levels, carbon dioxide levels, and battery life.
It also provides detailed data on depth, time, and other key parameters, giving divers all the information they need to make informed decisions and stay safe while underwater.
What are the benefits of the Mares Horizon SCR?
There are many benefits to diving with the Mares Horizon SCR:
1. Extended Dive Times
The system offers extended dive times, thanks to the efficient recirculation of gas. This can be especially important for deep or complex dives, where bottom time is limited by decompression obligations or other factors. The Horizon SCR also provides a very stable breathing mix, which can reduce the risk of decompression sickness and other diving-related injuries.
Keen to try rebreather diving but unsure where to begin? Then check out our blog Start Rebreather Diving Today – SSI SCR Diving.
2. Versatility
Another key advantage of the Mares Horizon SCR is its versatility. The system can be used for a wide range of diving applications, from shallow reef dives to deeper wreck penetration. It can also be adapted to different nitrox gas mixtures and diving conditions, making it a great choice for experienced extended range divers who need maximum flexibility in their equipment.
3. Ease of Use
One of the biggest benefits of the Mares Horizon SCR is its ease of use. The unit is designed to be intuitive and user-friendly, with a simple layout that allows divers to easily navigate and access all the necessary functions. The menu system is easy to navigate, and the unit provides clear, easy-to-read information.
Additionally, the Mares Horizon SCR features an auto-calibration function, which makes setup and calibration a breeze.
With the Mares Horizon SCR, divers can spend more time exploring the underwater environment and less time fussing with their equipment.
4. Cost
When compared to other rebreather options on the market, the Mares Horizon SCR is relatively affordable. While it is still an investment, it is significantly less expensive than a closed-circuit rebreather.
The Mares Horizon SCR an excellent choice for divers who are looking to try out rebreather diving without breaking the bank. It is also a great option for experienced rebreather divers who want to add a high-quality, reliable unit to their collection without spending a fortune.
Learn more about the awe-inspiring history of tec diving with The Evolution of Technical Diving – From Cave Diving to Deep Sea Exploration.
What are the Challenges of Using the Mares Horizon SCR?
Like any piece of diving equipment, the Mares Horizon SCR has its own set of challenges and potential drawbacks. For one, the system can be more complex and require more training and preparation than is needed for traditional open-circuit scuba diving.
Divers using the Horizon SCR must be familiar with the system’s various controls and settings and must be able to troubleshoot any issues that may arise.
The Horizon SCR also requires careful management of the breathing gas mixture. Divers using the system must be well-versed in gas analysis and monitoring and must be able to adjust the system as needed to maintain safe breathing levels.
September 12, 2026
