發信人: jamewang (mass)    看板: Aero
日期: Sun Feb 27 11:15:20 2000
標題: Re: 太康

tacan penetration:
what:"tactical air nevigation"....it devided into 2 kind : tacan and hi-tacan (
     tacan is used for "low altitude(about below 10000ft)" plane. and hi-tacan
     is for "hi altitude(above10000ft)" jet ....) .
when:when you are in the high altitude and you want to decend and landing in 
     that airport....
how:there are a lot of military textbook to introduce it ..
    if you want to process the tacan ,
 firstable , you must have a tacan penetration chart , or you recite it in 
      your mind ...   
 if you got it and you are now in the air and you want use tacan for landing
 this airport.....you have to calculate the EAT(estimate approach time)
 and the heading that to intercept the IAF(initial approach fix)
 and request to the air controller :
 ex:kangshiung approach , wc-110 position "tainan tacan 110 radius , 45 miles
    heading 180 request tainan hi-tacan penetration , EAT 25 ( present time
    plus the time you reach to the IAF including holding pattern.....)
    if the controller admit your request , you can direct to the IAF and 
    remember reduce your airspeed to 250kias below before 3 minites to the IAF
 if the controller refuse your request , you can ask for a holding point and 
 wait for his admit....
   if the controller admit your request but change your EAT...you still direct
   to the IAF and after you reach the IAF you can join the holding pattern to
   hold .....(but you should know how to waste the rest time by the holding 
   pattern first...)
by the way , cause the different heading to the IAF , there are three way to 
begin you penetration or join holding pattern.......
  1.directly 
  2.cross 
  3.pallele 
  

next time......
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* Origin: 中山大學-美麗之島BBS * From: 210.242.73.169 [已通過認證]
.