JOE(USA)
Hero Member
- Dec 3, 2006
- 668
- 5
- Detector(s) used
- Tesoro Cortes/Tiger Shark,Whites,B.H./ Teknetics,3DElectronics/ Two Box, Minelab XS,Excal.
Hi,
I have a Garmin Etrex Cx and I want to calibrate the altitude feature on it. I thought I could find a USGS bench mark in my area and use that. The problem is those markers do not seem to be available on the internet? Does anyone know of a website or a different way to do it accurately? Joe
I have a Garmin Etrex Cx and I want to calibrate the altitude feature on it. I thought I could find a USGS bench mark in my area and use that. The problem is those markers do not seem to be available on the internet? Does anyone know of a website or a different way to do it accurately? Joe