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>This is impressive. Is there any consensus on why the Maximus performs so >well? Though I have owned one myself, I would have had no specific reason >to guess that the Maximus would be significantly better than any other in >resisting freezing. We think that the Maximus regs do so well because of the heat transfer plates. There are fins that are in the mouth piece tube that transfer heat from your breath to the second stage valve body. There is also a plate in front of the exhaust valve that also preforms this task. These do a lot. It is also very valuable to be able to turn the air control valve down (or even off) to help control any incipient free flow. >My own diving is in water that is rarely colder than 4.0 - 5.0 C. If I were >diving in sub-freezing water, I would consider using a FMM on *every* dive >that did not require a gas switch. We do not use FFMs for the most part because we are diving under a ceiling and must be able to find the 4' diameter hole. If you DO have a problem -and this used to be pretty common- and have to go to the back-up reg, I don't want to lose my vision too. For most of the season here the vis is several hundred feet and we do not use a tether. >(Excuse my curiosity: are you writing from McMurdo? Do you spend the full >year there on station?) I arrived here at McMurdo Station on 5 Oct and will be leaving on 7 Feb. I've been working in the Program for 18 years. I wintered in '81 and '85. Cheers- Rob Robbins Scientific Diving Coordinator US Antarctic Program -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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