「航空機のさまざまなライトと、それぞれいつ使うか説明できますか？」
この質問はICAO ELP試験で繰り返し登場します——特に地上作業・冬季・夜間飛行を含む写真描写シナリオで。長年の運航で多くのパイロットは感覚的に答えを知っています。難しいのは、それを英語で、求められた瞬間に、試験というプレッシャー下で明快かつ正確に説明することです。
本コラムでは、各ライトの完全な整理、試験で通用する英語の定義、そして頻出する追加質問を解説します。
基本の定義
Anti-collision light（beacon／衝突防止灯）:
“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（ストロボ灯）:
“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（位置灯）:
“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.”
その他の重要なライト
Landing light（着陸灯）:
“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（タキシー灯）:
“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.”
点灯・消灯のタイミング
「これらのライトは正確にいつON/OFFしますか？」——ここで試験官は、定義だけでなく知識の深さを試します。
- Anti-collision light: エンジンスタート前にON、シャットダウン後にOFF。”The anti-collision light is typically turned on before engine start and kept on whenever the aircraft is being operated.”
- Strobe light: 滑走路進入時にON、着陸後クリアでOFF。”We avoid keeping them on while taxiing because the intense flashes can distract or disorient ground personnel.”
- Position light: エンジンスタートからシャットダウンまでON。”Anytime the aircraft is being operated.”
「ライトのON/OFFを忘れたことはありますか？」
この質問も頻出です。軽いエピソードで正直に答えましょう。
“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.”
どんなミスも「学んだ教訓」とセットにします。自己認識＋是正行動の組み合わせが好印象を与えます。
「胴体の上下にあるライトは何ですか？」
“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.”
別名の “beacon” に触れると語彙の深さを示せます。
重要語彙
- 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
核心のポイント
英語で名前を知っているだけでは足りません。強い回答と弱い回答を分けるのは なぜ（why） を説明できるか——なぜストロボは滑走路でONにしタキシー中はOFFなのか、なぜビーコンはエンジンスタート前にONなのか。その理由づけこそ、試験官が聞いている部分です。