Featuring build that minimizes environmental impacts, this proportional scale calculator enhances productivity with straightforward operations, perfect for beginners in labs or workshops Designed for students, professional, and enthusiasts in aviation, and technical fields, this navigational tool supports quick learning and reliably application in training and work environments Ideal for scenarios such as flight navigation, marine charting, and technical drawing, its compact design allows effortless portability in backpacks or tool set for on the go efficiency This high precise slide rule delivers accurate measurements and versatile electronic proportional scaling, solving issues with traditional tools like wear and inaccurate readings for navigation and plotting tasks Crafted from lightweight with clear markings, it ensures easy handling and long lasting without causing fatigue during extended use, Manufacturer: Greabuy