Navman S35 GPS

My lovely brother gave us a Navman S35 GPS navigator for Christmas.  Cool!  It works great in the car (its intended purpose).  However, he suggested we might enjoy some geocaching.

Hmmm. Not so fast.  On the surface this thing has some serious shortcomings for non-car navigation

• small battery (<3 hours runtime away from the car)
• Has the "feature" that it shows your position on the nearest road, rather than where you actually are.
• Apparently the GPS has 'static navigation' turned on, which means position is not updated unless the unit is moving faster than some speed.  Makes it hard to get an exact fix when you are stationary.
• Need to use windows software to load waypoints

But all is not lost. This thing is running a cut-down version of windows CE, and with some tweaking http://navmanunlocked.wikispaces.com/ other software can be loaded and run.

The S35 appears as a usb memory device when connected to my GNU/Linux laptop.  However, the default settings result in corrupt files when writing to it.   So the first thing to do is set up a script and udev rule to perform echo 64 > /sys/block/sdb/queue/max_sectors_kb

I'll attach the files when I figure out how.

So far NoniGPSPlot is the best freeware GPS software I have found that runs on the S35. I've even got it to show maps from OpenStreetMap using taho.pl to download the map tiles