[Flight Operation] Approach Lighting System (ALS)

Approach Lighting System (ALS)

가. 목적 : 계기비행방식으로부터 시계비행 방식으로 전환

 

나. 길이

- 정밀접근 활주로 : Landing threshold로부터 2,400 ~ 3,000ft

- 비정밀접근 활주로 : Landing threshold로부터 1,400 ~ 1,500ft

 

다. 종류

- ALSF-2 : ALS with Sequenced Flashing lights. CAT-Ⅱ,Ⅲ

- ALSF-1 : ALS with Sequenced Flashing lights. CAT-Ⅰ

- SSALR : Simplified Short Approach Lighting System with RAIL

- SSALF : Simplified Short Approach Lighting System with Sequenced Flashing Lights

- MALSR : Medium intensity Approach Lighting System with RAIL

- MALSF : Medium intensity Approach Lighting System with Sequenced Flashing Lights

- RAIL : Runway Alignment Indicator Lights

- ODALS : Omnidirectional Approach Lighting System

* RAIL vs REIL RAIL : Runway Alignment Indicator Lights REIL : Runway End Identifier Lights

라. 비교

 

ⓐ ALSF-2 vs SSALR : 기상이 좋을 때 ALSF-2는 SSALR로 점등 가능

 

 

ⓑ SSALR(MALSR) vs SSALF(MALSF) : Sequenced Flashing Light의 수에 따라 구분

* RAIL (Runway Alignment Indicator Light) : Sequenced Flashing Light이 5개