On the Nav Computer: Put 445 (km) on inner main scale next to the
km-m-ltr index, go to Naut.m.
index and read groundspeed in knots; 240 kts.
Put 60 (minutes) on inner
main scale next to 240 (kts) on outer main scale, go
to 180 (minutes) on inner main scale and read distance travelled on outer
scale; 720nm.
720nm due South = 720
minutes of latitude = 12šLatitude.
If aircraft started at
10šN and travelled South for 12š Latitude it would be
at 02šS.