The Basic Definitions
Anti-collision light (beacon):
“The anti-collision lights are red flashing lights located on the top and bottom of the fuselage. They are used to make the aircraft visible to other aircraft and ground vehicles, especially when engines are running or when the aircraft is about to move.”
Strobe light:
“Strobe lights are white, high-intensity flashing lights located on the wingtips and sometimes the tail. They are much brighter than anti-collision lights and are primarily used when the aircraft is airborne to ensure maximum visibility to other aircraft.”
Position light:
“Position lights are steady lights — red on the left wingtip, green on the right wingtip, and white on the tail. They show the orientation of the aircraft and have been a standard navigation light requirement since early aviation.”
Other Important Lights
Landing light:
“Landing lights are powerful forward-facing lights that illuminate the runway during approach and landing. Many airlines also turn them on below 10,000 feet to increase visibility — it’s part of the ‘lights on below 10’ concept.”
Taxi light:
“Taxi lights are lower-intensity lights used for taxiing on the ground. They illuminate the taxiway ahead and help pilots navigate in darkness or low visibility.”
When to Turn Them On and Off
“When exactly do you turn these lights on and off?” — this is where the examiner tests depth of knowledge, not just definitions.
- Anti-collision light: On before engine start, off after engine shutdown. “The anti-collision light is typically turned on before engine start and kept on whenever the aircraft is being operated.”
- Strobe light: On when entering the runway, off when clear after landing. “We avoid keeping them on while taxiing because the intense flashes can distract or disorient ground personnel.”
- Position light: On from engine start to shutdown. “Anytime the aircraft is being operated.”
“Have You Ever Forgotten to Turn a Light On or Off?”
This question comes up frequently. Answer honestly with a light episode:
“I once had a situation where after an early morning departure, I realized the strobe lights were still on while taxiing to the gate. It was a minor oversight — we corrected it immediately. It was a good reminder to always run through the after-landing checklist methodically rather than rushing.”
Pair any mistake with a lesson learned. Self-awareness combined with corrective action makes a strong impression.
“What Are the Lights on the Top and Bottom of the Fuselage?”
“Those are the anti-collision lights — also called the beacon lights. The red flashing lights on the top and bottom of the fuselage are specifically designed to alert ground personnel that the engines are running or the aircraft is about to move. When you see the beacon on, you know to stay clear of the engines.”
Mentioning the alternate term “beacon” demonstrates vocabulary depth.
Key Vocabulary
- Anti-collision light / beacon
- Strobe light
- Position light (red = left, green = right, white = tail)
- Landing light / Taxi light / Runway turnoff light
- Wingtip / Fuselage
- Steady light / Flashing light / High-intensity
The Key Point
Knowing the names in English isn’t enough. What separates a strong answer from a weak one is explaining why — why strobe lights go on at the runway and not during taxi, why the beacon goes on before engine start. The reasoning is what the examiner is listening for.
