On the Nav Computer: Centre dot on TAS 555kts, put the heading, 229 o T, under the HEADING index.  With heading 229 o T and track 239 o T the drift is 10 o Stbd (right).   Mark the wind vector where the drift (10 o Stbd) crosses the groundspeed (577kts).  Rotate to put this mark under the centre dot and read the wind: 130 o T/100kts.