Function: 1. On-board computer: A comprehensive calculator for use in aviation, offering accurate calculations of speed, fuel consumption, and estimated arrival time. 2. Air Navigation Ruler: Specially designed for wind vector solutions, determining the impact of wind on speed and course during flight. 3. Lightweight and portable: Some users prefer a handheld on-board computer due to its compact size, durability, one-handed ease of use, speed and no power requirement. 4. Improve flight planning: Use this on-board computer when planning your flight to calculate fuel consumption, wind corrections, route time, and other parameters. 5. Plastic: This on-board computer calculator is made of durable plastic, ensuring long-lasting performance and reliability in aviation and navigation tasks. Specification: Item Type: On-Board Computer Material: plastic Colour orange List of packages: 1 x Air Flight Ruler 1 x Vector Ruler