The buffer parser "was" setup and working as follows...
According to the PDF with sample data you could so this...
which matches this...
using buffer parser set as per the info you provided...
however
The values still need some math as per the PDF
For example, you can clearly see from the screenshots above, we correctly make the values
lat: 5007.4965 and lon:838.1157 just like in the screenshot of your documentation
NOTE however that is not the end of the work - you need to apply the maths it states to turn those into usable coordinates.
So, to progress this, you could add a function node AFTER the buffer-parser and perform the necessary maths on msg.payload.lat and msg.payload.lon to make usable coordinates.
