Avionics Fundamentals - Vor, Rmi, DME

Explanation
30 Hz reference signal and a 9960 Hz subcarrier.

Explanation
The statement is incorrect because the reference and variable signals cannot be in phase at 180 degrees magnetic. In-phase signals have a phase difference of 0 degrees, while signals with a phase difference of 180 degrees are said to be in opposite phase or out of phase.

Explanation
The radial signals of a VOR always point away from the station.

Explanation
The variable amplitude modulated (AM) signal is conventionally derived from the lighthouse-like rotation of a directional antenna array 30 times per second (30Hz).

Explanation
The VOR takes a 9960 Hz carrier and frequency modulates this carrier with the REF 30 Hz signal.

Explanation
30 Hz variable (VAR), which is amplitude modulated by the antenna
9960 subcarrier is frequency modulated (FM)

Explanation
The correct answer is "Slaved compass". In RMI (Radio Magnetic Indicator), the compass information is referred to as the slaved compass. A slaved compass is a type of compass that is electronically connected to the aircraft's navigation system. It receives signals from the navigation system and automatically adjusts its readings to compensate for any deviations caused by the aircraft's magnetic field. This ensures accurate and reliable compass information for the pilot during flight.

Explanation
False. The standby compass in an aircraft typically indicates Magnetic North, not True North. The difference between True North (geographic north pole) and Magnetic North (where the Earth's magnetic field points vertically down) is known as magnetic variation or declination, which must be considered for accurate navigation.

Explanation
The pointers on the RMI indicate the bearing. The bearing is the direction from the aircraft to a specific point on the ground. The RMI (Radio Magnetic Indicator) is a navigation instrument that displays the aircraft's magnetic heading and the bearing to a selected navigation station. It helps the pilot determine the direction to fly in order to reach their desired destination.

Explanation
DME (Distance Measuring Equipment) is typically used in conjunction with VOR (VHF Omnidirectional Range). VOR provides the aircraft with the direction or bearing to a ground-based station, while DME provides the distance from the aircraft to that station. By using both systems together, pilots can determine their exact position in relation to the VOR station, allowing for accurate navigation and flight planning. ADF (Automatic Direction Finder) and ILS (Instrument Landing System) are not typically used in conjunction with DME.

Explanation
DME (Distance Measuring Equipment) supplies range information up to 250 NM (nautical miles). This means that the DME can provide accurate distance measurements for objects or locations that are within a radius of 250 NM from the aircraft.

Explanation
The VOR frequency range is between 108 to 117.95 MHz

Explanation
Slant Range refers to the actual line-of-sight distance to the station. It is the distance between the observer and the target, measured along the line of sight. This measurement takes into account the elevation and the angle between the observer and the target, providing an accurate distance measurement. It is different from Ground Distance, which refers to the distance measured on a flat surface, and Range to the horizon in NM, which refers to the distance to the point where the Earth's curvature obstructs the line of sight.

Explanation
DME transponders transmit on a channel in the 962 to 1150 MHz range and receive on a corresponding channel between 962 to 1213 MHz.

Explanation
An HSI (Horizontal Situation Indicator) uses a Horizontal Gyro. This type of gyroscope is specifically designed to measure the aircraft's roll and pitch movements, providing accurate and reliable information about the aircraft's attitude and heading. The Horizontal Gyro is an essential component of the HSI, which displays the aircraft's heading and navigation information to the pilot in a clear and intuitive manner.