Russ wrote:
[em]Michel, my brother got a handheld portable unit for this very reason. Its meant for hiking and camping with being under trees. Ill ask him later what one he got...[/em]
[/p] Michel wrote:[/p] [p style="font-style: italic;"]Excellent, ask him also if he knows how many meters this thig seems to be precise to if he knows.[/p]
[/p]We use this thing for boating as well so it had to be really durable. If you look you can find these cheaper than what the garmin site is saying.
[/p]vny!s://buy.garmin.com/shop/shop.do?pID=351
vny!://www.trailspace.com/gear/garmin/gpsmap-76csx/review/12178/
vny!://gpsinformation.us/gps60c/g76Creview.html
[font face="Arial,Helvetica"]SA Watch Plots Under Moderate Tree Cover[/font]
(The reference point here is only known to about 1m, and therefore the WAAS Spec of 3m is not expected) [/p][font face="Arial,Helvetica"][font size="+1"]GPSmap 76Cx with New Chip Software and Unit Firmware[/font][/font]
[img]vny!://gpsinformation.us/gps60c/76Cx.JPG" width="609" border="2" height="390"]
[font face="Arial,Helvetica"]GPSmap 76Cx Summary: 95% of errors are 4.4m or less, average error is 2.0m, and drift is 3m/min[/font]
Note: The unit is now receiving WAAS Sat #51. [/p][img]vny!://gpsinformation.us/gps60c/76C-plot.jpg" width="609" border="2" height="390"]
[font face="Arial,Helvetica"]GPSmap 76C Summary: 95% of errors are 7.1 m or less, average error is 1.3m, and drift is 5m/min[/font]
Note: The unit is receiving both WAAS Sats #51 and #48.[/p]
Thus the new software and firmware for the GPSmap 76Cx has improved its accuracy (under tree cover) from about 10m to 4.4m 95% of the time. The GPSmap 76C accuracy remained in the neighborhood of 7m. [/p]
[font face="Arial,Helvetica"]Comparative Accuracy:[/font] Using a moderate tree-cover test site, we ran 30-minute test runs with[a href="vny!://www.gpsinformation.net/main/sawatch.htm"] [font face="Arial,Helvetica"]SA Watch[/font][/a] comparing the GPSmap 76C to the Magellan SporTrak Color ([font face="Arial,Helvetica"][a href="vny!://gpsinformation.us/gps60c/76C-trees.html"]HERE[/a][/font]). The 76C seemed quite "erratic". 95% of the 76C errors were 9.7 meters or less, where the SporTrak Color were less than 1.6 meters. [/p]
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