Garfieldus:
OK, now I comprehend what you are getting at.
The automotive GPSR's (SP III, SP 26xx) can accomplish what you want to do, but the methodology is different, because in an automotive environment, you won't ever exactly retrace your path in the opposite direction. To do so would be to invite a head-on collision. To examine what you list, in your order:
1. Record a track - Easy enough, just ensure that track recording is turned on, this is done in the options section of the SP III or SP 26xx.
2. Save when memory is 99% full - Can be accomplished by downloading the track to a PC, using the MapSource application. The automotive units don't have a capability to save multiple sequences of tracks internally on an indefinite basis, as the 296 (and probably the 276) have.
3. Rename the tracklog Can be done on your PC, once you have downloaded the log. You can either rename the individual leg segments by themselves, or aggregate the track.
4. Clear the active tracklog Can be done on any of the automotive units.
Reload a saved tracklog and retrace it, maybe even in reverse. You can accomplish the same thing on an automotive GPSR, the difference being that you don't accomplish it by using the tracklog feature, you accomplish it using the autorouting feature. If you want to repeat a track, you set it up as a route. If you want to "reverse" a track, you have different ways of doing this - on the newest model automotive units, you choose "Return to Start" from the route menu, and the GPSR will take you back where you came from.
The intended application for exact retracing of track logs, and exact reversal of track logs, is marine navigation - to be more specific, recreational marine navigation with small vessels. When you get into the more powerful marine navigation systems that are used in large commercial vessels (freighters, ferries, etc.), they actually use an "autorouting" system that is very similar to the Garmin automotive GPSR's, because in commercial marine navigation, the shipping lanes are direction-specific.
The same holds true for aviation work - if I want to go from Zurich to London and back using my Garmin 430 and 530 panel mount Flight Management System (what I use when I am at work), I use the "autorouting" function to call up departure, enroute and arrival segments that are one way tracks. Coming back in the other direction, I would use different one way tracks.
The bottom line, Garfieldus, is that if you want to continue to use a screwdriver to perform the work of a chisel, that's your business, but don't sow confusion for others by complaining about what a poor job your screwdriver does of chipping away at stones.
If all you want to do is record and renavigate (in either direction) off-road tracks with your motorcycle, buy a
Garmin Geko 101 new for USD $80 - it will allow you to do exactly what you have specified.
PanEuropean
