The "bridge" of an air liner -- the instrument board before the pilot and co-pilot on one of the new Boeing, Wasp-powered, passenger planes operated by United Air Lines. The Sperry Artificial Horizon (upper right center) shows whether the plane is on an even keel, and the Sperry Directional Gyro (upper left center) guides the pilot on a true course.

© 2006 adventurelounge.com