Mailing List Archive

Mailing List: techdiver

Message Display

> >you need to get rid of the FFM
> >and dive the unit with a mouthpiece for many hours and then come back to
> >the FFM. You may still experience what happened to you at depths shallower
> >than 150 (your cutoff for FFM use) under some conditions with a FFM.
> 
> Why do you feel that the relatively inexperienced rebreather diver should be
> using a mouthpiece rather
> than a FFM?  Is this a private recommendation to Kevin because of his beard
> or is it a general recommendation for all rebreather divers?

I'm not sure why Farb recommends it, but I would recommend it because of 
the fact that a lot more water gets into the loop on typical dives with a 
FFM than with a mouthpiece, and you really ought to have some solid 
experience dealing with a lot of water in the loop.  

> Why do you place depth limitations on the FFM?

Again, I can't answer for Rod, but I would also recommend avoiding FFM's
on deco dives unless the mouthpiece has an integrated OC regulator with
the ability to plug in an unlimited OC gas supply (e.g., stage bottles).
The last thing you want to have to do in a hail-mary OC bailout situation
is to have to go blind so that you can stuff a bailout regulator in your
mouth. 

Aloha,
Rich

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]