為什麼飛機會在下降前在外海繞了好幾圈?

luck630320

剛剛去flightradar24看桃園進出場的路進
看到一些飛機在外海繞了幾圈才下降
請問為什麼要這樣呢?

buda

原因有2點:1.多半是因為機場起降班機太擁擠,所以塔臺先令要降落的班機在機場外兜圈子,等待機場起降班機較空檔時,再安排降落. 2.機場的氣候能見度太低,(或有大風切或下沉氣流等因素)影響班機降落,所以先在機場外兜圈子,等待能見度變好,塔臺再安排降落.
平時可以到YouTube搜尋"空中浩劫"影片看看,就能了解許多航空事件.

lulk0427

因為只有單跑道作業

RIHC

ARR FLOW CONTROL IS CONDUCTED FOR TFC LDG RCTP, DUE TO RWY CONST,
SINGLE RWY IN USE. SEPARATION ON INDIVIDUAL TFC BASIS AS FLW:
1.BULAN
  AT LEAST 30NM BTN 0200-0700
  AT LEAST 40NM BTN 1030-1400
2.SALMI
  AT LEAST 30NM BTN 1030-1400
3.ENVAR
BTN 0200-0700
  A.DEP TFC FM VHHH, AT LEAST 40NM
  B.DEP TFC FM VMMC, AT LEAST 60NM
  C.TFC TRANSIT HONG KONG FIR DEST RCTP, AT LEAST 10 MIN OR 80NM
BTN 1030-1400
  A.DEP TFC FM VHHH, AT LEAST 60NM
  B.DEP TFC FM VMMC, AT LEAST 80NM
  C.TFC TRANSIT HONG KONG FIR DEST RCTP, AT LEAST 10 MIN OR 80NM
4.KAPLI
  AT LEAST 30NM BTN 0200-0700
  AT LEAST 30NM BTN 1030-1400
5.SULEM AND KASKA
  AT LEAST 50NM BTN 0200-0700
  AT LEAST 50NM BTN 1030-1400
6.POTIB
BTN 0700-1400
  A.DEP TFC FM MANILA FIR, AT LEAST 8 MIN OR 60NM
  B.TFC TRANSIT MANILA FIR DEST RCTP, AT LEAST 8 MIN OR 60NM
  C.BTN TFC DEP FM MANILA FIR AND TFC TRANSIT MANILA FIR DEST RCTP,
    AT LEAST 4 MIN OR 30NM
RMK:
1.EVERY WED, FRI AND SUN, FLOW CONTROL WILL BE CONDUCTED
  UNTIL 1500UTC.
2.10-15 MIN SEPARATION INCREASED WHEN THERE IS BAD WEATHER OR
  FOREIGN OBJECT DAMAGE ON RUNWAY.
3.ABOVE FLOW CONTROL MIGHT BE ADJUSTED BASED ON REAL TFC AND
  IS SUBJECT TO DUTY SUPERVISOR OF TAIPEI ACC.
4.EXPECT 10-20 MIN DLA FOR ARR TFC. 02 JUN 14:00 2015 UNTIL 31 AUG 14:00 2015
ESTIMATED. CREATED: 29 MAY 07:08 2015


REF AIP SUP 05/14 DATED 19 MAY 2014, TAIPEI/TAIWAN TAOYUAN INTL AIRPORT ARRIVAL SPEED CONTROL AND DESCENT PLANNING.WITH EFFECT FM 16 JUN 2014,0000UTC,IN ORDER TO IMPROVE OVERALL EFFICIENCY AND TO FACILITATE AN ORDERLY TFC FLOW, TURBOJET ACFT ARRIVING TO TAIPEI/TAIWAN TAOYUAN INTL AIRPORT SHALL COMPLY WITH THE ARR SPEED CTL,UNLESS OTHERWISE INSTRUCTED BY ATC OR ENTERING HLDG PATTERN. 16 JUN 00:00 2014 UNTIL PERM. CREATED:19 MAY 14:40 2014