، يُرَكِّز، يُوَجِّهوَرْطَه، صُعوبَهيُثَبِّتُيُثَبِّتيُرَتِّب، يُعيِّن، يُحَدِّدThe position of the ship or aircraft determined from the bearings of two or more acknowledged factors, from astronomical observations, or from radio alerts, and many others.SMART Vocabulary: link