Nav Computer:  Slow speed slide: centre dot on TAS 220kts, wind direction (160ºM) HEADING index, mark wind speed (50kts) below centre dot (170kts).  

Track (course) under HEADING index (212ºM) and note drift (12º Stbd).  

Adjust heading for drift: HEADING 201ºM, drift 11º Stbd, TRACK (Course) 212ºM – groundspeed (under wind mark) 186 kts.