Does anyone know of a way to easily convert XYZ survey data into the more standard "from to distance bearing clino" for survex input?

Format currently is:

(I realise there is a way to input these directly into Survex, but i don't want them as fixed points.)

If you cant find a simple app, then I would just do it in Excel with trigonometry.

I should add it will likely need some manual input as you will need to know the sequence of stations. (Hope this helps and isnt too basic)

The CARTESIAN function in SURVEX allows you to specify dx, dy, dz between survey stations rather than having to use fixed points.  therefore your data is

*data cartesian from to northing easting altitude
153    DS1    -1.12         9.84 0
DS1    DS2    10.42 4.73 -0.8
DS2    DS3    11.85 4.21 -1.11
DS3    DS4    12.68 3.94 -0.81

Perfect, thanks Duncan.