Historical information

Standard issue item as used by Australian servicemen during conflict in Vietnam (1962-1973). Plotting boards are a secondary means of firing control for all mortars. The user can determine deflection, azimuth, and range.

Physical description

The M19 plotting board consists of a rotating disk of transparent plastic and a removable range arm (missing), both attached to a flat round white grid base.

Inscriptions & markings

North, South, East , West / Rotating disc calibrated with numbers