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Scuba_Vixen · 26th September 2005, 04:22

Quote: (Originally Posted by scubapolly)

I do a wide variety of diving, and yes I do travel a lot to dive, typically by airplane.

Currently for divies in the 100-150 foot range I use doubles typically 85s but 121s on occasion. Often with deco. I like to dive wrecks.

There are several wrecks I have my eye on in the 200-300 foot range so I have been looking to do trimix. I have been advised by several that a rebreather will pay for itself in the helium savings. Also I have been told that if I do trimix training, and then move to a rebreather I will then have to do rebreather trimix training, and therefore I am better off to do rebreathers first.

Thanks for any advice.

Polly

Depending on the dives and the cost of the trimix fills, it'll take close to 500 dives to pay for the Rebreather. That's assuming you get an RB that's rated to 300' or more, but not one of the really expensive ones (like Boris), which would take a lot more dives to recoup.

There have been several good threads on the pros and cons of learning mix with a CCR, without having dived it OC first. The more OC deco diving experience you have, especially in longer dives with extensive gas management planning and multiple stage handling, the easier it will be to skip OC mix and learn it CCR. If you're still fairly new to technical diving with significant deco obligations, then doing OC mix first is probably better. When you have to bail at 300', you better be spot on with your contingency plans and able to remain cool and focussed...... That comes with experience at depth. You need to gain that slowly and incrementally.

If you expect to skip OC mix classes, be prepared to spend a lot more $ for the Rebreather mix cert, as it's going to take a lot more class and dive time, than if you'd been mix cert'd already. You probably won't really end up saving that much $$.

You'll probably get several different opinions here, but from what you've posted so far, I'd suggest doing normoxic mix and see how you feel at 200' first. If you feel good with that and want to go farther, then would be the time to decide between hypoxic OC mix or going to CCR for mix.

I'm just getting the feeling that you need a lot more experience before contemplating mixed gas and it's depths.

Safe dives,

Darlene

Since you mention doubles and deco for your 150' dives, I'm assuming you're adv. nitrox / deco proceedures cert'd ?

26th September 2005, 04:22	#9 (permalink)
Scuba_Vixen e/mCCR Dolphin Pilot Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: May 2005 Location: St. Croix USVI Posts: 557	Quote: (Originally Posted by scubapolly) I do a wide variety of diving, and yes I do travel a lot to dive, typically by airplane. Currently for divies in the 100-150 foot range I use doubles typically 85s but 121s on occasion. Often with deco. I like to dive wrecks. There are several wrecks I have my eye on in the 200-300 foot range so I have been looking to do trimix. I have been advised by several that a rebreather will pay for itself in the helium savings. Also I have been told that if I do trimix training, and then move to a rebreather I will then have to do rebreather trimix training, and therefore I am better off to do rebreathers first. Thanks for any advice. Polly Depending on the dives and the cost of the trimix fills, it'll take close to 500 dives to pay for the Rebreather. That's assuming you get an RB that's rated to 300' or more, but not one of the really expensive ones (like Boris), which would take a lot more dives to recoup. There have been several good threads on the pros and cons of learning mix with a CCR, without having dived it OC first. The more OC deco diving experience you have, especially in longer dives with extensive gas management planning and multiple stage handling, the easier it will be to skip OC mix and learn it CCR. If you're still fairly new to technical diving with significant deco obligations, then doing OC mix first is probably better. When you have to bail at 300', you better be spot on with your contingency plans and able to remain cool and focussed...... That comes with experience at depth. You need to gain that slowly and incrementally. If you expect to skip OC mix classes, be prepared to spend a lot more $ for the Rebreather mix cert, as it's going to take a lot more class and dive time, than if you'd been mix cert'd already. You probably won't really end up saving that much $$. You'll probably get several different opinions here, but from what you've posted so far, I'd suggest doing normoxic mix and see how you feel at 200' first. If you feel good with that and want to go farther, then would be the time to decide between hypoxic OC mix or going to CCR for mix. I'm just getting the feeling that you need a lot more experience before contemplating mixed gas and it's depths. Safe dives, Darlene Since you mention doubles and deco for your 150' dives, I'm assuming you're adv. nitrox / deco proceedures cert'd ?
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