CNP-2 Electronic Scale Slide Rule for Pilot Training and Paper Chart Navigation

CNP-3 Slide Rule for Aeronautical Chart Measurement and Scale Conversion Tasks

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

ABS Navigation Slide Rule Model CNP1 CNP2 CNP3 KCNP1 for VFR and IFR Chart Work

CNP-3 Slide Rule for Air Navigation Distance Angle Conversion 38.1x7cm

CNP-1 Multi Function Slide Rule for Distance Angle and Scale Conversion

CNP-3 Aviation Slide Rule for Distance Angle Measurement on Paper Charts