The calculator side is a circular slide rule. The wind correction side with the sliding plate is a nomogram. https://www.gleimaviation.com/e6b-flight-computer

The calculator side is a circular slide rule. The wind correction side with the sliding plate is a nomogram. https://www.gleimaviation.com/e6b-flight-computer-instructions/ https://www.gleimaviation.com/e6b-flight-computer-instructio...