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I don't know this for a fact but the origin of the prohibition may be the= =20 French Navy. I don't know the reason for it. In a country where the=20 government supplies the medical care to its citizens it would be pretty=20 easy to cut someone off from health care for a violation of government=20 rules. For the remainder of this post I'm going to make a joke: The=20 reason may be that because the U.S. had a monoply on the world's supply=20 of helium in the early 1900's, France decided to ban its use. On Fri, 6 Oct 1995, Marc Dufour wrote: > At 12:33 PM 10/6/95 +0100, Jean-Marc Bourguet wrote: > >> From: "A.Appleyard" <A.APPLEYARD@fs*.mt*.um*.ac*.uk*> > >> A> Deep diving on ordinary air is dangerous because of nitrogen narcos= is. > >> B> Some people claim to be able to dive deep on air despite this. > > > >There is a C with bother me: people are diving deep air because of > >insurance compagny... Usually these are quick to get their liability > >void if you do something dangerous. So I conclude that they think that > >it is more dangerous to sucba dive with trimix than with air. >=20 > The reason is propably because some dumbass actuary (I worked with tho= se, > and they are incredibly dense mathematical/statistics nerds - some are al= so > on the verge of being psychotic) determined that the extra handling of ge= ar > needed when one does gas switches induces a higher risk than straight air > diving. And the data used was probably the usual inconsistent, incomplete= , > anecdotal information we usually get from diving accidents. >=20 > Needless to say, the same nerd with a slide rule evidently does not kn= ow > what is a oxygen partial pressure, nor that CO2 buildup triggers respirat= ion. >=20 >=20 > >----------------------------------------------------------------------- > > Jean-Marc Bourguet Service d'Electronique > > Faculte polytechnique de Mons > > Email : bourguet@mu*.fp*.ac*.be* Belgique >=20 > Prenez donc une bonne Gueuze Belle-vue =E0 ma sant=E9... :) >=20 > -- > Send mail for the `techdiver' mailing list to `techdiver@terra.net'. > Send subscription/archive requests to `techdiver-request@terra.net'. >=20
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