Originally Posted by
Seattle Forrest
Yes, and also off course alerts when I deviate on the way back.
Off course warnings are just basic track following (it works without "turn guidance" enabled).
Originally Posted by
Seattle Forrest
This sounds like a bug. There's no reason the device needs road information to follow the track it has in memory. Maybe this was required at some point due to limitations in the way it used to be implemented, and has since been fixed. In any case, this is not accurate today as we have seen. Garmin is continually improving their products and details about how they work have a shelf life.
No, it's not a bug. All of the Edges work basically the same way. (It's
possible the 1040 is different but not likely.) Sure, Garmin improves stuff but there is a lot of behavior that is basic/legacy that hasn't been changed.
Try using "turn guidance' with the detailed map disabled ("turn guidance" requires a routable map).
Keep in mind that (on the Edges), there are two navigation modes: (1) basic track following (doesn't require a map) and (2) "turn guidance" (which requires a routable map). You can use one or the other or both modes.
Note that “course points” are part of track following (and don’t require maps).
One the Edges, "turn guidance" (the big white arrows) is based on a second route calculated by the unit by picking the roads/paths on the installed map that the track appears to follow.
The track (from the file) shows up as a magenta line with black borders (it looks purple). The second route is a magenta line that is wider than the track line (the track line is drawn on top of it). Usually, these two lines follow each other fairly closely (especially if you use OSM to plan the route).
Here's an example route (from a 1030) that goes "off road". You can see the two routes. If you look closely where there's "one" line, you can see a light magenta border outside the file-track line.
The "turn guidance" (big white arrows) turn instructions are based on the light magenta line.
