To steer a course, you must plot it on a map (called a chart at sea) and adjust the compass card on the compass, the deviation of which and the variation of the geographical area having been corrected.
Ukuqhuba indlela kufuneka uyibeke kwimephu (ebizwa ngokuba yitshati yaselwandle) ulungise ikhandi lekhampasi kwikhampasi, ukuphuma apho iindidi zobume bezulu zilungiswa khona.