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

Professional Flight Navigation Slide Rule KCNP-1 Electronic Scale Tool

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

Navigation Slide Rule KCNP-1 Compatible with Standard Aeronautical Charts

KCNP-1 Aeronautical Slide Rule with Clear Visibility for Chart Details

CNP-3 Flight Navigation Drawing Rule with Angle Distance Scale Functions