What do the bearing pointer select buttons on the EHSI cycle through?

The bearing pointer select buttons on the Electronic Horizontal Situation Indicator (EHSI) cycle through VOR, GPS, and declutter mode. This means the pilot can switch between different navigation reference sources displayed on the EHSI.

VOR (VHF Omnidirectional Range) is a traditional navigation method that helps pilots navigate by triangulating their position relative to VOR ground stations. GPS (Global Positioning System) represents modern satellite-based navigation, allowing for precise location and course tracking. The declutter mode helps minimize the visual information on the display, reducing clutter for easier interpretation when looking for specific data.

This cycling feature is essential for pilots as it enables them to select the most pertinent navigation information for their flight, enhancing situational awareness and operational efficiency in the cockpit. The ability to switch between these navigation sources allows for greater flexibility and adaptability during various phases of flight.