a mate you will meet this roar had a montana unit and sold it because his phone with topo maps was more accurate and you could do more with it, i know i know back to the old cell phone but he had a top end unit and ended up using his cellphone. Ive got an older unit as a backup get to a campsite and turn on and mark it then turn off and only use it if i loose or break my phone which is my primary gps. So not much help mate but he was over his unit not loading and accurate position and taking minutes in kaimanawa forest bush to locate satellite's
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