Myths about Rebreather Diving
Rebreather divers will probably agree, the worst part of rebreather diving is having to address the questions and myths surrounding this new technology. Just like everything else in scuba that goes through a progression, divers will learn in time that gauges are better than J-valves, trimix isn't a voodoo gas, and rebreathers are the future of deep exploration and extended length recreational diving. We're taking the myths on, and if you think we missed one, please email it to us and we'll add it.
Myth 1: Rebreathers are Responsible for Random Diver Fatalities
Fact 1: While there have been unfortunate accidents involving rebreathers, the majority of these accidents could have been avoided by following proper pre-dive checks and maintaining vigilance underwater. Dive conservatively, follow your training, don't cut corners on your pre-dive setup, and pre-breathe your unit for at least 5 mins and you'll probably catch any glitches before they become problems.
Myth 2: Rebreather Diving is More Expensive than Open Circuit
Fact 2: Likely false. If you purchase a rebreather and never use it, then you'll spend more on your equipment and training than an open circuit diver would, but even once a month use for the rebreather will quickly add up. If you currently suffer from hundreds of dollars in trimix and high gas bills on those doubles, you'll save tons of money when you switch to a rebreather and spend $20 for dinner and your gas for several days of diving! The up front costs can be more than open circuit, but long term consumables tend to favor rebreather divers, although it varies greatly based on your location and diving.
Myth 3: It is better to use a Manual CCR rather than Electronic (mCCR vs eCCR)
Fact 3: False! Manual CCRs have the benefit of limited electronic components that can fail, but those electronic components such as the Hammerhead Handsets on the Dive Rite O2ptima or Vision electronics on the Evolution/ Inspiration provide information and 'supervision' over your system that a mCCR might not have. It's like taking the power steering out of your car; sure its one component less to fail, but it's another added challenge during your dive. Both types have proven safety records, so best to consult with your instructor and other rebreather divers when deciding what unit suits you best, but we typically prefer eCCRs to mCCRs for most divers.
Myth 4: Some Rebreather are Safer than Others
Fact 4: False. Any rebreather has the potential to fail, just like any regulator or other component. Given proper training, pre-dive checks and pre-breathing, rebreathers tend to be fairly safe.
Myth 5: You should have Trimix certification in Open Circuit before learning a rebreather
Fact 5: While you absolutely need to be a comfortable and skilled diver, you do not need to be an expierenced technical diver to enroll in a rebreather course. Many divers choose to skip the 'pleasure' of doubles completely and go straight to rebreathers, it really depends on a diver's comfort level. If in doubt, talk to your instructor!