Definition
A high-intensity flashing light source used in modern airport rotating beacons that produces brief, powerful flashes of light visible in all horizontal directions by rapidly discharging stored electrical energy from a capacitor through a gas-filled tube, rather than rotating a continuous lamp.
Plain English
It is the flashing light unit inside a modern airport beacon that sends out a quick, bright burst of light in every direction at once, instead of spinning a steady bulb around to create the flash effect.
Context Anchor
Seen in airport beacon descriptions, especially when explaining how some airport beacons flash without using a rotating light.
Derivation
Omnidirectional comes from the Latin omni, meaning all, plus directional, so light goes out in all directions. Capacitor-discharge describes how the device works: a capacitor stores up electrical energy and then releases it all at once to produce a bright flash. Together the name tells you what it does and how it does it.
Why Pilots Care
Enables pilots to locate and identify airports visually during night or low-visibility operations.
Analogy
It works much like a camera flash: energy is stored briefly, then released all at once to make a bright burst of light.
Intuition Check
Do not assume the light must rotate to be seen from all directions. In this term, omnidirectional means the flash is visible all around the airport even though the device itself may be fixed.
Example Sentence 1
Many newer airport beacons use an omnidirectional capacitor-discharge device, which produces sharp flashes visible from any angle around the airfield.
Example Sentence 2
During night operations the pilot spotted the omnidirectional capacitor-discharge device marking the field several miles out.