I run back and forth on the roof untill I get my bearing. Sucks when its got
a steep pitch though...........LOL
  Joe
RiverNet

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Eje Gustafsson
Sent: Sunday, September 07, 2003 6:20 PM
To: Dave Covert
Subject: Re: [smartBridges] What device are you using to aligne antenna ????


>>Then your GPS has a built in magnetic compass..

DC> Uh... no... that's why I have a compass...

>>A TRUE GPS can not tell directions while your standing still.

DC> Define 'tell directions'... What a GPS does best is to tell you what 
DC> distance and bearing one point (your destination, tower, camp, 
DC> fishing hole,
DC> etc) is from where you are right now (i.e. client site). If you are in
DC> motion, you can make your 'course over ground' match the desired bearing
and
DC> run straight up to you desired point.

Ok. tell directions as in telling you what compass heading your facing.
Clear enough for you now ? Sure a GPS can tell distances and bearings
between 1 stored point and the current location but it can't tell you what
direction that bearing is UNLESS you have a built in electronic compass or
as in your case you use a external compass.

So the only way for a GPS to tell you your heading is if you move. Great
that we are in agreement.

DC> If you are not in motion, you have to have a compass to show you 
DC> your desired heading.

There I have to both agree and disagree there are GPSs with electronic
compasses that can tell you heading even if your not in motion.

>>If your GPS can tell you directions why not use it instead of the 
>>compass to tell you what direction 143* is ?

DC> Still a question?

Ones again your GPS can't SHOW you the direction it can just calculate the
compass heading between your current location and a waypoint or the heading
between 2 waypoints.

I guess it all comes down to the choice of words "headings, directions,
bearing etc" for what is what and how you can tell what.

The computer system in the GPS can calculate the bearing then the compass
can show you the direction/heading of the bearing.

- Eje

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