Your octi is a vital piece of gear and choosing the right one for you is important. The goal of all alternate air supplies is the same: to provide a second chance air supply if your regulator or your buddy's fails during a dive. Octis then deliver air on demand at ambient pressure, but are usually set to reduce freeflow when not in use. Only you know which alternate air supply suits you. Only you know your budget and what other features are important to you and your style of diving.
Some divers simply advise - get the most expensive octi you can afford - but here’s some other considerations:
| Sherwood Gemini | Atlantis Icon O1 | |
|---|---|---|
| Does it have ergonomic low-profile design? |
Yes | Classic design |
| Is the purge button easily pressed even when wearing thick neoprene gloves? | Yes | Yes |
| Is it an integrated power inflator inline octo? | Yes | No |
| Materials? | Chrome plated brass and stainless steel | Chrome plated brass, 303 stainless steel, passivated internal parts |
| What BCDs does it connect to? | Most - 26mm hose | No |
| What’s the warranty? | Lifetime of original owner limited warranty |
Lifetime of original owner limited warranty |
| What’s the service schedule? | 1 year service | 1 year service |
| Which Dive Alert air horn fits? | DA2, DP2 | N/A |