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

Navigation Slide Rule CNP-1 Designed for High Altitude Humid Environments

CNP-3 Plastic Slide Rule for Flight Navigation Scale Conversion and Plotting

Aviation Slide Rule Flight Simulator Training Angle And Distance Conversion

CNP-2 Slide Rule for Manual Navigation on VFR and IFR Aeronautical Charts

Aviation Slide Rule Portable For Manual Navigation Multifunctional Measurement

Aviation Slide Rule Oil And Seawater Resistant Portable For Manual Navigation

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