The arm is then lined up on the Magnetic bearing of an observed object, or Magnetic course required, making sure that the centre of the disc is over the object observed, or last position, to layoff a future course.
Ingalo iphinda idweliswe kwisinamatheli seempawu zento ephathekayo ebonelwayo, okanye isinamatheli zendlela esifunekayo, wenze/uqinisekise ukuba umbindi wesigcini ndaba ungaphezulu kwento ephathekayo nebonakalayo, okanye indlela yokugqibela, ukubeka indlela yobomi.