[aprssig] Garmin nuvi 350

Scott Miller scott at opentrac.org
Tue May 26 11:31:26 EDT 2009

It doesn't seem to be compressed.  At least, there's a lot of readable 
stuff in the ~9 MB binary file that it uploads.  In any case, it's very 
doubtful that a single file could be replaced to change it.  It's going 
to be some little piece of code buried in there somewhere, very hard to 
find without a debugger to watch it executing.

If it was running on a PC, I'd at least have a chance of tracing the 
execution and finding it, though it might still be hard to patch.

With access to the source code, I doubt it'd take more than 30 minutes 
of work.  That's the frustrating part... Garmin can do it, they just 
don't see the need.


Mark Cheavens wrote:
> I have been thinking about this and I wonder if it would be possible to 
> decompress the compressed file system that the Nuvi uses and figure out 
> which file (if possible) is responsible for this and patch it into the 
> other Nuvi's.........
> Just my thoughts,
> Mark
> At 11:43 PM 5/25/2009, you wrote:
>> I know a lot of people were saying at Dayton that they couldn't find 
>> the nuvi 350.  Looks like Radio Shack's got them on sale through the 
>> end of the month:
>> http://www.radioshack.com/product/index.jsp?productId=3480192
>> Until we manage to convince Garmin to fix the other models, this is 
>> the only one that doesn't display duplicate positions for moving 
>> stations. It'll work with the Tracker2 or with the D7/D700/D710 using 
>> the GTRANS cable.
>> Scott
>> N1VG
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