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Hello,

How can I erase the NAV 1 And 2 ? Because I searched but I didn't found...
Thanks in advance for your help

If you mean stop NAV1, NAV2 navigation:

- Tap the compass rose for displaying menu
- Press Navigate
- Press Stop NAV1 navigation...

Yes thank you i searched that ! Thank you very much !

Just another question :
What is the difference between an OSM and an OTM map ? Because i read something about that but i didn't understood very well...

OSM = Open Street Maps www.openstreetmap.org is a free map developed by Internet community
OTM = Open Topo Map is maping OSM data with elevation data

OSM cover the world
OTM is currently limited to western Europe

Okay, I understand now. Thank you very much