To: "Mounted search and rescue" <msar-riders@lists.ibiblio.org>
Subject: Re: [MSAR] GPS Tip
Date: Tue, 27 Feb 2007 13:58:48 -0800
It helps to make sure everyone is using the same GPS settings, too ... field
and management. ;)
~ ~ ~ ~
Jorene Downs
SAR & CERT
Mounted SAR
www.ceoates.com/msar
----- Original Message -----
From: Chuck Daniel
Over the past weekend, our group did some routine GPS training in the form
of a treasure hunt. What should of gone smoothly turned out poorly. Here
is what happened. One in our group set out the course, depositing the
treasures and recording the latitude and longitude of each treasure (way
points). She returned and gave us the coordinates and we inputted them into
our GPS units. We broke into teams and off we went. My team found the
first two locations but that may of been by luck since we noted that in each
case the coordinates were off by 30 seconds in both lat and long.
The rest of the treasures were never found because of the 30 seconds error.
A 30 second error is over a half mile of error. What we learned from this
is that we need to compare all GPS units periodically.