The above-described two three eighths of an inch holes on either side of the disc centre are used to get the disc exactly over a point on the chart.
Ezi zicacaswe apha phezulu zichaza izibhozo ezintathu ezimbini zomngxuma we-intshi kwelinye le cwecwe zisetyenziswa ukufumana icwecwe kanye ngaphaya kwepoyinti ekwitshati