Reading Navigon for iPhone .targets format

[routeconverter]

Just opening the file in a hex or test editor, it definitely looks like a binary format (readable string snippets sprinkled throughout the "noise"). Can you tell I am not experienced with binary formats?

I don't like them either since there is almost never a documentation for file formats in the GPS space.

What I was hoping for was simply some basic tips on how I might try to parse this file.

Well, have a look at the NavigonRouteFormat, then at your file, start the debugger, set breakpoints, compare data, modify the code. Start at the beginning. Calm down and be patient ;-)