@aviation.tac: PAPI lights, or Precision Approach Path Indicators, are visual aids that help pilots maintain the correct vertical profile during landing approaches. They consist of four lights that appear white or red depending on the pilot's position relative to the glide slope. Here's how to interpret PAPI lights: All white: The aircraft is too high. Two white, two red: The aircraft is on the correct glide slope. All red: The aircraft is too low. Pilots adjust their pitch and power to maintain the "two white, two red" indication, ensuring a safe and accurate approach. PAPI lights are particularly useful at smaller airports without Instrument Landing Systems (ILS) and during visual approaches. They can also be activated at uncontrolled airports at night using the Pilot Controlled Lighting (PCL) system.

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Saturday 25 April 2026 18:25:50 GMT