要乘飛機必須提前定位子。 To ride in an aeroplane you have to book in advance.
方位，相對位置方向，尤指用地理學的或天體圖線測量的從一個固定位置到另一個位置的帶有角度的方向 Direction, especially angular direction measured from one position to another using geographical or celestial reference lines.
定位推算位置這樣計算所得的位置 The position so calculated.
定位推算計算某艘船或某架飛機位置的行為或過程 The act or process of calculating the position of a ship or an aircraft.
這個閃光燈是幫助飛機確定位置的。 This is a beacon to help aircraft discover their position.
