On the short transit across the Bay to Inhaca Island which is about 16 nautical miles, it is quite permissible to take the average of all the variation lines which cross your path.
Koluthutho lufutshane ukuxwesa ibheyi ukuya kwisiqithi-iInhaca esiyi 16 semayile esetyenziswa elwandle, ngokuvumelekileyo ukuthatha umlinganiselo oguqu-guqukayo.