Nav Computer:  centre dot on TAS 470kts, wind direction (030º) under the HEADING index, mark wind speed (100kts) below centre dot (370kts).  

Track (course) under HEADING index (085ºT) and note drift (11º Stbd).  

Adjust heading for drift: HEADING 074ºM, drift 10º Stbd, put track (085º) under 10º Stbd drift, heading 075º, drift 10º Stbd Course 085ºM – groundspeed (under wind mark) 404 kts.  

On reverse side: put 60 (minutes) on inner main scale next to groundspeed (404 kts) on outer main scale.  

Go to distance (265 nm) on outer main scale and read time in minutes next to it on inner main scale: 39 minutes