[pct-l] how an altimeter works, take 2

[Halfmile]

Lenny,
On my Suunto watch you set the "Use" to either "alti" or "baro". I
always leave mine set at "alti"
Some of the newer Suunto watches are suppose to somehow sense movement
and automatically switch between the modes.

-Halfmile

On Tue, Mar 3, 2009 at 8:59 PM, Lenny Leum <littleleum at yahoo.com> wrote:
> The question remains though, how does the watch supposedly determine which pressure change is due to elevation
> and which pressure change is due to changes in weather?  I can see that this contradiction is what makes it inaccurate, but, does the device generally assume a steady barometer?  I'm just wondering if these devices are "smart" and how that works.
> Lenny
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