CB avoidance en route

순항 중 뇌우(CB) 회피입니다. 핵심은 레이더로 셀을 보고, ATC에 편위(deviation)를 요청해 충분한 간격으로 돌아가는 것. 좁은 판단이 아니라 "미리 요청하고 협조"가 포인트예요. 문법은 이유를 명사로 붙이는 due to / because of 입니다.

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1. Scenario

I was the First Officer of HL123, in the cruise on an oceanic route.

On the weather radar, we detected a large line of CB cells building up ahead, right on our track. Flying through a thunderstorm can cause severe turbulence, hail, and icing, so we needed to go around it.

We asked ATC for a deviation to the left of track first, but that side was blocked by opposite-direction traffic. So we requested right instead, and ATC approved up to twenty miles right of track; we turned and stayed well clear of the cells.

We kept the cells on the radar and gave the controller updates as we went. We avoided the worst of the weather by a safe margin.

Once we were past the line, we returned to our track and continued the flight normally.

2. At a Glance

English — En route we saw a line of thunderstorm (CB) cells on the radar, right on our track. Flying through a CB means severe turbulence, hail, and icing, so we avoid it by a good margin. The flow is: request a deviation left or right of track due to weather, stay well clear of the cells, keep ATC updated, and return to track once clear. It is about planning ahead and coordinating, not reacting at the last minute.

한국어 — 순항 중 레이더에 뇌우(CB) 셀들이 항로 위에 줄지어 보였습니다. CB를 통과하면 심한 난류·우박·착빙이라 충분한 간격으로 피합니다. 흐름: 기상 때문에 항로 좌/우로 편위 요청 → 셀에서 넉넉히 떨어져 비행 → ATC에 상황 업데이트 → 빠져나오면 항로 복귀. 막판 반응이 아니라 미리 계획하고 협조하는 게 핵심.

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3. Key Verbs

detect

뜻: 탐지하다

• We detected a line of CB cells on the radar.
• The radar detected heavy returns ahead.

build up

뜻: 발달하다

• The cells were building up ahead on our track.
• The weather built up quickly during the afternoon.

deviate

뜻: (항로를) 벗어나다, 편위하다

• We deviated to the right of track.
• We asked to deviate around the cells.

request

뜻: 요청하다

• We requested a deviation due to weather.
• We requested up to twenty miles right of track.

avoid

뜻: 피하다

• We avoided the worst of the weather by a safe margin.
• We avoided flying through the thunderstorm.

update

뜻: (상황을) 알려주다

• We updated the controller as we went.
• We kept ATC updated on our deviation.

return

뜻: 복귀하다

• We returned to our track once clear.
• We returned to the route after the cells.

monitor

뜻: 계속 확인하다

• We monitored the cells on the radar.
• We monitored the weather ahead the whole time.

assess

뜻: 판단하다

• We assessed which side was better for the deviation.
• We assessed how wide a margin we needed.

resume

뜻: 재개하다

• We resumed normal cruise after the weather.
• We resumed our planned route.

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4. Key Expressions & Collocations

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5. Vocabulary

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6. Sentence Frames

빈칸만 갈아끼우면 다른 기상·항로 상황에도 그대로 씁니다.

• On the weather radar, we detected ____. → On the weather radar, we detected a line of CB cells ahead.
• Flying through ____ can cause ____, so we ____. → Flying through a thunderstorm can cause severe turbulence, so we went around it.
• We requested a deviation ____ due to weather. → We requested a deviation to the right of track due to weather.
• We stayed well clear of ____ and kept ATC updated. → We stayed well clear of the cells and kept ATC updated.
• Once we were past ____, we returned to track. → Once we were past the line, we returned to track.

오늘의 표현 포인트 — "We requested a deviation to the right of track due to weather." 무엇을, 어느 쪽으로, 왜(due to) 요청하는지 한 문장에 담는 틀. 기상 회피의 표준 요청입니다.

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7. Common Mistakes → Better Phrasing

한국인이 자주 쓰는 틀리거나 약한 표현을, 시험에서 통하는 표현으로 바꿔 익히세요.

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8. Grammar Point — Reason with a Noun (due to / because of)

이유를 명사로 붙일 때는 due to / because of를 씁니다. (because + 절과 구분)

• We requested a deviation due to weather.
• We turned right because of the line of cells.
• The delay was due to the thunderstorms on the route.

핵심: due to / because of + 명사(구). 절을 붙일 땐 because + 주어 + 동사("because the weather was bad"). 요청·보고에 짧고 명확합니다.

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9. Model Answer — Q1

"What happened to your aircraft? Explain the nature of the incident."

틀은 자유 — 무슨 일 → 어떻게 대처 → 결과 흐름이면 됩니다.

In the cruise on an oceanic route, we detected a large line of CB cells on the weather radar, right on our track. Flying through a thunderstorm can cause severe turbulence, hail, and icing, so we needed to go around it.

We asked ATC for a deviation to the left of track first, but that side was blocked by opposite-direction traffic. So we requested right instead, and ATC approved up to twenty miles right of track; we turned and stayed well clear of the cells.

We kept the cells on the radar and gave the controller updates as we went, so they always knew where we were. We avoided the worst of the weather by a safe margin.

Once we were past the line, we returned to our track and continued normally. It worked because we used the radar early, asked for the deviation in good time, and kept ATC in the picture.

10. Model Answer — Q2

"How do you think ATC handled the situation? Could it have been handled differently?"

Q2 = ATC 평가로 의견 표현을 익히는 자리. 아래는 한 예시 — 외워서 그대로 쓰지 말고, 시작·마무리 표현은 자유롭게 바꿔 보세요.

I have to say, ATC made it feel easy. Our first choice, deviating left, was blocked by opposite-direction traffic, but when we asked for right they approved twenty miles without any delay — a generous margin, so we never had to argue for room near the cells. They also coordinated with other traffic, so our deviation caused no conflicts.

My one note: telling us what the aircraft ahead were doing about the line would have helped us pick our side sooner. That said, their quick approval and clear coordination made the avoidance easy.

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11. Follow-up Q&A

1. Why not fly through the gap between cells? → Gaps can close quickly and still contain turbulence and hail, so we stay well clear with a safe margin.
2. How do you decide which side to deviate? → We assess the radar picture and the wind, and we choose the side with more clearance and a smoother return to track.
3. Why keep ATC updated? → So they know our position and can keep other traffic clear while we are off track.
4. What is the danger of a CB? → Severe turbulence, hail, icing, and lightning, which can damage the aircraft and injure people.

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12. Shadowing Sentences

각 문장을 3~5번 소리 내어 따라 하세요.

1. On the weather radar, we detected a line of CB cells ahead.
2. Flying through a thunderstorm can cause severe turbulence, hail, and icing.
3. We requested a deviation to the right of track due to weather.
4. ATC approved a deviation of up to twenty miles right.
5. We turned to stay well clear of the cells.
6. We kept the cells on the radar.
7. We gave the controller updates as we went.
8. We avoided the worst of the weather by a safe margin.
9. Once we were past the line, we returned to our track.
10. We continued the flight normally.

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