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Date: Fri, 08 Oct 1999 19:00:50 -0400
From: Case <diveman@cy*.co*>
To: "Sean T. Stevenson" <ststev@un*.co*>
CC: Steve Lindblom <s_lindblom@co*.co*>,
     "techdiver@aquanaut.com"
Subject: Re:
Must be a fresh water diver... the water I dive in weighs 64 pounds per
cubic foot!

-Case

"Sean T. Stevenson" wrote:
> 
> I have to disagree with your statement that English units are more
> intuitive.  Metric (or more appropriately, SI) units are inherently
> interrelated, and decimal system based.  For example, the mass of one
> cubic metre of water is one thousand kilograms, (one kg per litre), or
> exactly one million millilitres (cc's).  This decimal relationship
> makes mental calculations much easier than the English system, where
> one cubic foot of water masses 1.94 slugs, weighs 62.4 pounds, and is
> 144 cubic inches.
> 
> The United States influence worldwide is probably the only reason the
> English units are still widely used.  Once the US officially converts,
> SI will become standard worldwide.
> 
> As far as diving is concerned, one atmosphere is ten metres depth, as
> opposed to thirty-three feet in the English system.  This would make me
> want to lean to the SI system for diving applications.
> 
> -Sean
> 
> On Thu, 7 Oct 1999 12:27:18 -0500, Steve Lindblom wrote:
> 
> >Because while the big multinationals and one-world-government types all
> >push the metric system, the we-actually-have-to-use-the-stuff people in
> >most non-metric nations vastly prefer the old units.
> >
> >From a human factors point of view, the old units are far superior. They
> >are also much better for estimating, measuring in the field and doing quick
> >mental calculations. The entire metric system is based on a basic
> >misconception about how people use information.
> >
> >So one set of units fine, but don't be so fast to assume it should be metric.
> 
> --
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