What type of reception antenna is used for Very High Frequency Omnidirectional Range (VOR) and Localizer (LOC) installations on aircraft?

For Very High Frequency Omnidirectional Range (VOR) and Localizer (LOC) installations on aircraft, the correct choice is a horizontally polarized omnidirectional reception antenna. This type of antenna is specifically designed to optimize the reception of signals transmitted from VOR and LOC facilities, which employ horizontal polarization for their signals.

In aviation, VOR and LOC systems are essential for navigation and approach procedures. These systems are designed to provide precise directional information to aircraft, and a horizontally polarized omnidirectional antenna is effective in receiving the signals across a broad area, allowing pilots to navigate accurately regardless of their orientation relative to the station.

The horizontal polarization aligns well with the transmission format of these navigation signals, enhancing reception and minimizing interference. This alignment helps maintain signal integrity and clarity, which are critical for safe aerial navigation.

While other types of antennas have their specific applications, they are not suited for the consistent performance required by VOR and LOC systems, making horizontally polarized omnidirectional antennas the standard choice for these installations.