SSI Horizon SCR Rebreather Become an SSI SCR Diver today Join the exciting world of rebreather diving! Learn to dive without decompression on an SCR rebreather with the SSI SCR Diving course. This Extended Range course provides a thorough introduction to rebreather use, SCR technology, installation details, pre-dive checks, dive planning and dealing with potential malfunctions. The SSI SCR Diving course teaches you to dive safely with the Mares Horizon rebreather up to 30 meters deep and is the perfect introduction to SCR diving. This rebreather certification will allow you to stay deeper for longer than you ever thought possible. Become a well-prepared, capable and autonomous SCR diver with SSI today!