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I'm looking into underwater voice communications and have some questions for those that have experience with the various units; please note that I do both deep (300fsw+) Trimix diving as well as the usual typical deep air diving involving at least one if not more gas swithches: 1. If you use a unit that requires a full face mask, how do you manage gas switches; do you use a manifold and if so what's the cost; do you use a quick disconnnect on the secondary regulator? How do you manage if you need glasses; are the lenses ground to Rx? What's the cost for these types of fixes and issues? 2. If you use a device that just has a mouthpiece, how do you manage gas switches? Do you need a new unit for each regulator? (This would get expensive when doing 3 or more gas switches so I guess I'd limit it to the EAN 80 and bottom mix). Is there a "work around"? Lastly, since I do these types of dives with several different buddies cost is a real consideration as I'd need to supply the other guy as well for the dive. Harold Gartner hgartner@ra*.or* CompuServe ID 71470,1423 6900 Via Alba Camarillo, California 805 482-9743
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