CR-3 Circular Computer 係咩嚟？/ What is CR-3 Circular Computer?
Flight Computer可算是機師在Air Navigation中不可或缺的儀器.一般Flight Computer都有兩面,一面能計算飛機的速度,耗油量,最佳飛行高度及不同單位的轉換.而另一面則能夠計算風速在不同方向的力度，有助機師準確地計算飛行的方向.
Flight Computer is one of the essential tools for pilots in air navigation. A flight Computer is consists of 2 interfaces where 1 interface helps the pilots to calculate the airspeed, rate of fuel consumption and optimum cruise altitude, and it also provides a direct conversion between units. While another interface helps the pilot to calculate the wind variations and wind correction angle.