IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This instrument, manufactured by Lear ...

[Ken] recently obtained an attitude indicator—sometimes called an artificial horizon—from an F-4 fighter jet. Unlike some indicators, the F-4’s can rotate to show pitch, roll, and yaw, so it moves in ...

A AC -- Advisory Circular. ACARS -- Airline Communications Addressing and Reporting System. ACAS -- Aircraft Collision Avoidance System. ADC -- Air Data Computer. ADF -- Automatic Direction Finder.