Your mental idea of where you are takes precedence, and any evidence that really should tell you that you are somewhere else will be ignored. It can be very hard to realize you need to scrap that mental idea and start all over again.
Yup, in orienteering we call that "creative landscaping".
...if used with a map/compass, the batteries in a GPS can last a very long time. Turn it on and take a good fix. Mark that spot as a waypoint on the GPS and transfer the geo-fix to your map. Turn the GPS off.
...If you use those 9 hours 5 minutes at a time, battery life is measured in days/weeks.
Exact-a-mundo. Use lithiums and the lifespan is even longer, with improved reliability in cool weather.
I've used a Garmin Vista HCx for years but over time I have realized that I almost always just need to get point position. The fancier features have not been necessary for me. I am itching to replace it with the smaller, lighter, and IMO more rugged Garmin Foretrex 401. The 401 has Garmin's high sensitivity chip, which is mandatory; I've never failed to get good results under heavy forest canopy. It's down to $167 shipped
at Amazon now, and I get paid this week...
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