Understanding Approach Lighting Systems
An approach lighting system forms a critical part of the overall Aviation Ground Lighting infrastructure. High intensity and low intensity approach lighting systems are available depending on the operational requirements, runway classification and visibility conditions at each airport.
For those seeking approach lighting systems explained, a complete system consists of multiple lighting elements positioned along the approach path to assist pilots during landing. These systems help flight crews visually identify the runway environment, establish the correct alignment and safely transition from instrument guidance to visual reference.
The specific configuration of approach lighting in airport environments will depend on factors such as licensing requirements, operational category and the need to maintain operations during periods of reduced visibility. Different types of approach lighting may also be required for civilian and military airports, making careful planning essential for a successful installation.
Simplified Short Approach Lighting Systems (SSALR)
Among the most widely used approach lighting types is the Simplified Short Approach Lighting System with Runway Alignment Indicator Lights (SSALR).
These runway approach lighting systems typically consist of a row of luminaires positioned along the extended runway centre line, supported by a crossbar containing 10 luminaires. The lighting arrangement is designed to provide clear visual guidance to pilots while remaining distinguishable from other aeronautical ground lighting and surrounding light sources.
Where low intensity SSALR systems are installed, luminaires are required to display red light to ensure clear differentiation from other airport runway lights.
Supplementary Approach Lighting for CAT II and CAT III Operations
Supplementary approach lighting is generally installed for CAT II and CAT III operations and was previously referred to as SHINGALS, or Supplementary High Intensity Narrow Gauge Approach Lighting System.
The system follows the same spacing arrangement used for touchdown zone lighting and aiming point surface markings. The luminaires used within these approach lighting systems are typically the same as those used in high intensity approach installations, with red filters fitted to side row barrettes to meet operational requirements.
Understanding the different approach lighting types and selecting the correct configuration is essential for maintaining safe and efficient airport operations, particularly during periods of low visibility.
