Whether you are solving wind triangle problems, po The calculator side are workable for multiplication, division, and unit conversion and employs scales for performing time, speed, distance, rate, fuel consumption, altitude, airspeed, air temperature, and pressure pattern calculations.lar grid navigation or pressure pattern flying, it will prove its usefulness and versatility constantly. This Circular Flight Computer will help you solve multiple calculations such as flight planning, basic arithmetic or complex in aviation computations. All printings are sandwich printed between two pieces of plastic so that the numbers/printings will never rub off during your long time usage. This Circular Flight Computer ( 6” diameter ) does everthing the slide graphic type E6-B do, and you can also use the wind side to solve problem for true wind, true course, wind in flight and speed issues. PATNETED IN USA-Made from waterproof plastic material, Built-in scale, more lighter, smaller, less prone to break easy rotating parts.