CNP-2 Flight Navigation Slide Rule with Angle Distance Scale Conversion Tool

Professional Flight Navigation Slide Rule CNP-2 with High Transparency

Flight Training Slide Rule CNP-2 for Chart Measurement Angle and Distance Calc

CNP-1 Flight Navigation Slide Rule with Angle Distance Scale Conversion

CNP-2 Slide Rule for Flight Navigation Use with 90% Light Transmittance Feature

CNP-2 Electronic Scale Slide Rule for Aviation Manual Navigation Tasks