My point being that a GPS device is mandatory if you wish indisputable accuracy
The purpose of this forum is to help our fellow members in offering up opinions,,,,as to the most expeditious solution to problem that is presented
When I proposed a smart phone app to perhaps help him out, never occurred to me thst one should first ax if he had access to a smart phone.
Tough Crowd!
We're the best. yes the mile markers are as accurate as an non electronic system can be but agreed I would borrow a smart phone or something similar. I catch Hell for this. I unhook the wire to disable the ringer at night.