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But the GPS could have exploded or melted in an extreme case. Still worth downloading some maps onto your phone just in case. The extra data weighs nothing*
* actually it does weigh something but probably not worth worrying about for a bike ride. This paper says 1TB of information weighs 1E-36 kg.
frankenbike-
You're clearly not a proper weight weenie. You'd be laughed at on certain cycling forums. :)
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But the GPS could have exploded or melted in an extreme case.
Sure, which is why my post was based on: "If she still has power for her GPS then maps (online or offline) aren't required."
Planning for what happens if the GPS goes is a completely different kettle of fish.
The FB update said the Garmin led her down the dirt path, so it's reasonable to assume she still had the Garmin in Gibbonsville where she decided not to backtrack to the 93/43 junction where she first deviated from the official route. She paused for 10 minutes or so at the turning in Gibbonsville, I'm sure she's ruing the decision she ended up taking.
Anyway, it's what she does once she's back on the route that matters now.
Oliver Schick
Greenbank
If she still has power for her GPS then maps (online or offline) aren't required. If she doesn't have an emergency power pack for the GPS then that's foolish.
The GPS should contain a track of the route. If it doesn't then that's just bonkers.
The GPS should contain her trackpoint history. If it doesn't then that's foolish.
So the GPS contains everything she needs to be able to backtrack to the point where she deviated. No maps required, just follow her history backwards until she is at the route again.
Her latest updates show she seems to be backtracking now. I wonder how far back she'll go.
[EDIT] It's about 2h back to Gibbonsville Road - where she turned off onto the dirt track. It's just over 30 mins to the farmstead where she could go East on a gravel track.
From a quick google it seems she's an hour from the 5.45am sunrise.