Saturday morning, four hours · 2,900 THB
Weekend Average Drills
If you have never drawn an average on a printed chart, start here. We keep the group small, we do not rush into dual systems, and we practise marking slope changes by hand.
This is not a substitute for the two-day workshop. It is the doorway: enough skill to sit in the longer room without feeling lost.
Open to beginners. Printed packets included.