These high quality Jeppesen Circular computers in three convenient sizes offer solid construction with performance and durability. Whether you are solving wind triangle problems, polar grid navigation or pressure pattern flying they will prove their usefulness and versatility constantly. Useful in high and low speed problems t...

The GAT-1 for rapid calculations of Drift and Ground Speed etc. A plastic circular calculator of 115mm in diameter for aircraft with cruising speeds between 90-130 knots. Coloured scales and a clear rotating Wind Arm make the instrument particularly simple to use for fast computations of Drift and Ground Speed corrections. Mag...

The IPC-1 for multiple Navigation and Instrument Flying calculations. A circular 115mm diameter calculator. Circular Slide Rule side is that of the CRP-1 without a cursor. For calculation and conversion of Temperature, Time, Distance Volume, Altitude and Density Altitude, Speed, Weight, Fuel, Multiplication and Division, 1 in ...

The CRP-9 is a circular computer of 140mm diameter Circular Slide Rule side is that of the CRP-5. With clear durable cursor for calculation and conversion of Temperature, Time, Distance, Volume, Altitude and Density Altitude, Speed, Weight, Fuel, Endurance, Multiplication and Division, 1 in 60 rule, Compressibility Correction e...