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

Navigation Slide Rule CNP-3 for Pilots Flight Planning and Course Plotting

CNP-3 Flight Planning Slide Rule for Manual Course Calculation and Scaling

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

CNP-3 Professional Pilot Tool for Dead Reckoning and Wind Triangle Calculations

CNP-3 Professional Slide Rule for Manual Navigation on Aeronautical Maps

Lightweight CNP-3 Navigation Slide Rule Designed for Portable Flight Use