Bearing-Distance-Heading Indicator

A Bearing-Distance-Heading Indicator (BDHI) is a navigation instrument used in aircraft to display information about the aircraft's bearing, distance, and heading. It provides pilots with essential information for navigation and orientation during flight.

The BDHI typically consists of a compass rose, which displays the aircraft's heading, and a digital or analog display that shows the bearing and distance to a selected navigation point or waypoint. The bearing is the direction from the aircraft to the selected point, while the distance indicates the distance between the aircraft and the point.

The BDHI is commonly used in conjunction with other navigation instruments, such as a VOR (VHF Omnidirectional Range) receiver or an inertial navigation system, to provide accurate and reliable navigation information to the pilot. It helps pilots maintain their desired course and track their progress during a flight.

In addition to displaying bearing, distance, and heading information, some BDHIs may also include additional features such as a course deviation indicator (CDI) or a horizontal situation indicator (HSI), which provide further guidance and situational awareness to the pilot.

Overall, the Bearing-Distance-Heading Indicator is an essential instrument for pilots, helping them navigate safely and efficiently during flight by providing accurate and real-time information about their position and orientation relative to their intended route.