I’m still alive!
I mentioned previously that I’d found a script from someone implementing a conversion to GPX from the new-ish Lowrance USR4 format, from their HDS chartplotters, of which I have one. I also mentioned I might try adding support for USR4 to gpsbabel, the tool of record for converting GPS data between formats.
Well, I did that sometime back in January, including support for both reading from and writing to USR4, and the code has finally made its way into gpsbabel’s trunk. So those who are interested can svn checkout and build gpsbabel themselves for now; or just wait for the next release which it seems will be coming shortly.
More updates pending, but that’s all for now!