8 ESSENTIAL MEASUREMENT SCALES: This versatile aviation plotter (or slide rule) features eight different functions, including Nautical Miles (Front), Statute Miles (Back), and scales for Sectional (1:500,000), WAC (1:1,000,000), and Terminal Area charts. | QUICK COURSE CALCULATION: Use the included magnetic variation scale and this flight computer to quickly convert true course to magnetic course for precise navigation. Easily determine your route using this plotter and any sectional chart. | ROTATING PROTRACTOR AZIMUTH: The built-in rotating circular protractor (rotating azimuth) simplifies calculations. Pilots can easily manipulate the bezel to find true and magnetic course in seconds on any matching sectional charts aviation uses. | THICK, DURABLE CONSTRUCTION: Made from 1.3 mm-thick, robust plastic, the plotter is designed for durability. It is flexible yet sturdy enough to resist bending and breaking, providing a lightweight, reliable tool for long-term flight training. | ESSENTIAL PILOT GEAR: This aviation tool is robust but still flexible enough to be easily manipulated without bending. Its lightweight and sturdy design prevents it from being too brittle or easily damaged, making it an indispensable piece of student pilot accessories.