Navigation Systems Flashcards
9 cards from real AET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 9 Navigation Systems flashcards as text
What is the primary purpose of an aircraft's VOR system?
Answer: Provide azimuth navigation information
The VOR (VHF Omnidirectional Range) system is a ground-based radio navigation aid that transmits signals in all directions. Aircraft receivers interpret these signals to determine their magnetic bearing (azimuth) relative to the VOR station, allowing for precise course guidance.
What does the DME system measure?
Answer: Distance to a ground station
The DME (Distance Measuring Equipment) system works in conjunction with VOR or ILS stations to provide pilots with a precise slant range distance to the ground station. This information is crucial for accurate navigation and position awareness, complementing other navigation aids.
Which system provides precise global positioning and navigation data to aircraft?
Answer: GPS navigation system
The GPS (Global Positioning System) navigation system uses a constellation of Earth-orbiting satellites to provide highly accurate three-dimensional position, velocity, and time information to aircraft anywhere on the globe. It is a primary source of precise global navigation data.
What type of navigation aid is an Instrument Landing System (ILS)?
Answer: Precision approach navigation aid
An Instrument Landing System (ILS) is a ground-based precision approach system that provides pilots with both horizontal and vertical guidance during instrument approaches to a runway. It allows for safe landings in low visibility conditions by guiding the aircraft precisely to the touchdown zone.
Which component in an ILS system provides lateral guidance to the runway centerline?
Answer: Localizer
The localizer component of an ILS system transmits radio signals that provide lateral guidance, indicating the aircraft's position relative to the runway centerline. It helps the pilot align the aircraft horizontally with the runway during an instrument approach, ensuring proper alignment.
What does a glide slope transmitter provide to an aircraft?
Answer: Vertical descent path information
The glide slope transmitter, part of the ILS system, provides vertical guidance to the aircraft, indicating the correct angle of descent to the runway. It ensures the aircraft maintains the optimal vertical path for a safe and stable approach, especially in instrument meteorological conditions.
Which system allows aircraft to determine bearing and distance using ground-based radio signals?
Answer: VOR/DME system
The VOR/DME system combines the capabilities of VHF Omnidirectional Range (VOR) for bearing information and Distance Measuring Equipment (DME) for slant range distance. Together, they allow aircraft to determine their precise position (bearing and distance) relative to a ground station, enabling comprehensive navigation.
Which instrument typically displays navigation signals from ILS, VOR, and GPS sources?
Answer: Horizontal Situation Indicator (HSI)
The Horizontal Situation Indicator (HSI) is a primary flight instrument that combines a directional gyro with navigation information from various sources like VOR, ILS, and GPS. It graphically displays the aircraft's heading, course deviation, and bearing to navigation aids in a single, intuitive presentation.
Why is redundancy critical in aircraft navigation systems?
Answer: To maintain navigation reliability and safety
Redundancy in aircraft navigation systems means having multiple independent systems or backup components. This ensures that if one navigation system fails, another can immediately take over, preventing loss of navigation capability and maintaining the safety of flight, especially during critical phases.