Introduction
Airfields are equipped with various technologies designed to assist aircraft on approach and ensure safe and efficient landings. In this article, we will discuss two of them: the Instrument Landing System (ILS) and the Distance and Directional Envelope (DME).
Instrument Landing System
Pros
An Instrument Landing System is one of the primary technologies used on airfields to assist aircraft on approach. ILS provides pilots with accurate distance and direction to the landing strip (Safety First, n.d.). It also allows pilots to reduce altitude and level the flight before landing, ensuring an accurate landing.
Cons
One of the main problems with the instrument landing system is the dependence on weather conditions. Poor visibility can reduce system accuracy and create hazards to the airplane and its passengers. In addition, the ILS requires regular maintenance and calibration to ensure its reliability and accuracy (Safety First, n.d.). If the system is not adequately maintained, it can lead to incorrect readings and landing hazards.
Distance and Direction Estimation
Pros
Distance and Direction Estimation is also widely used at airfields to guide aircraft during approach. DME provides pilots with accurate information about the distance to and direction to the runway. The system measures the time it takes for a radio signal to travel between an airplane and a ground station (What Is DME?, n.d.). DME allows pilots to accurately determine their location and distance to the runway, which ensures a safe landing.
Cons
One of the problems associated with using a distance and direction determination system is the limited coverage of the area. DME operates based on a radio signal that has a limited range (Distance Measuring Equipment (DME), n.d.). This means that the system may not be available in some remote or mountainous areas or may have limited accuracy. This can cause problems for aircraft flying in such areas and requires pilots to use other navigational aids.
Conclusion
The systems implemented at airports to support aircraft during landing approaches are essential in ensuring safe and efficient flight operations. However, they are also subject to some challenges related to weather conditions, maintenance, and limited area coverage. Regular maintenance and updating of these systems is essential to ensure their reliability and accuracy.
References
Distance Measuring Equipment (DME). (n.d.). Study Aircrafts. Web.
Lining Up with the Correct Glide Slope | Safety First. (n.d.). Web.
What is DME? Understanding How Distance Measuring Equipment Works. (n.d.). FLYING Magazine. Web.