Bearing-Range Indicator

A Bearing-Range Indicator (BRI) is a device used in aviation to display the bearing and range information of an aircraft in relation to a navigational aid or a selected waypoint. It is commonly found in aircraft navigation systems, such as the Instrument Landing System (ILS) or the VHF Omnidirectional Range (VOR).

The BRI typically consists of a circular dial or display that shows the aircraft's bearing in degrees and the distance to the navigational aid or waypoint in nautical miles. The bearing is represented by a pointer or a digital readout, while the range is displayed using markers or numerical values.

The BRI allows pilots to accurately determine their position and track their progress during a flight. By comparing the displayed bearing and range with the desired course and distance, pilots can make adjustments to stay on track and navigate to their intended destination.

In addition to providing bearing and range information, some BRIs may also include other features such as glide slope indications for vertical guidance during instrument approaches, or distance measuring equipment (DME) capabilities for precise distance measurements.

Overall, the Bearing-Range Indicator is a crucial tool for pilots to maintain situational awareness and navigate safely and accurately during flight.