The waves, when they travel long distances, follow the great circle and not a straight line on a chart, hence the antenna always measures the angle of the great circle and your boat's direction.
Amaza xa ehamba imigama emide elandela isangqa esikhulu hayi umgca othe tyaba kwitshati ngelixesha iimpondo zika nomathotholo zisoloko zilinganiswa kwii-engile yesangqa esikhulu nendlela isikhephe sakho esikhombe kuyo