Chapter 3 Datums 89 Examples Datum Target Symbol Movable Datum Target Symbol Symbol Specifications H = Letter height Datum target symbol without area size Datum target symbols with circular target area Datum target symbol with square target area Datum target symbol with rectangular target area Movable datum target symbol without area size Movable datum target symbol with spherical target area Datum Target number Target area size, when used 3.5H 0.8H 0.3H Can point either direction 60° Example 3-13. Drawing specifi cations for datum target symbols and example applications.