On the Nav Computer: Centre dot on TAS 230kts, put the heading, 307šT, under the HEADING index.  

With heading 307šT and track 313šT the drift is 6š Stbd (right).  

Mark the wind vector where the drift (6šStbd) crosses the groundspeed (210kts). 

Rotate to put this mark under the centre dot and read the wind: 260šT/30kts.