Go Back  PPRuNe Forums > Ground & Other Ops Forums > Questions
Reload this Page >

Approach chart questions

Questions If you are a professional pilot or your work involves professional aviation please use this forum for questions. Enthusiasts, please use the 'Spectators Balcony' forum.

Approach chart questions

Reply

Old 11th Mar 2018, 12:38
  #1 (permalink)  
Thread Starter
 
Join Date: Dec 2007
Location: Aviation Street 72
Age: 38
Posts: 150
Approach chart questions

1.For the minima from the below's example we set RA. Why the RA is not the same as DH?


2.At LRCL, VOR app has no minimums:



Why is so? Shall we use the circle to land minimums instead?
maximus610 is offline  
Reply With Quote
Old 11th Mar 2018, 13:39
  #2 (permalink)  
 
Join Date: Apr 2009
Location: On the Beach
Posts: 2,938
Originally Posted by maximus610 View Post
1.For the minima from the below's example we set RA. Why the RA is not the same as DH?
Because the surveyed terrain at the DA point is lower than the TDZ elevation.
2.At LRCL, VOR app has no minimums:
Many approaches don't have straight-in minimums because they don't meet requirements for straight-in minimums. So, you use the circle to land minimums. Perhaps you have to circle, perhaps you can land without circling.
aterpster is offline  
Reply With Quote
Old 15th Mar 2018, 10:04
  #3 (permalink)  
Thread Starter
 
Join Date: Dec 2007
Location: Aviation Street 72
Age: 38
Posts: 150
Thanks @aterpster for the answers.

Have just another question: why on NPA charts some approaches uses Apt Elev and Rwy:


and some uses only Apt Elev:


For precision approaches Rwy is always used for minima calculation. But pictures above confused me for non-precision stuff.
maximus610 is offline  
Reply With Quote
Old 15th Mar 2018, 14:35
  #4 (permalink)  
 
Join Date: Apr 2009
Location: On the Beach
Posts: 2,938
Originally Posted by maximus610 View Post
Thanks @aterpster for the answers.

Have just another question: why on NPA charts some approaches uses Apt Elev and Rwy:


and some uses only Apt Elev:


For precision approaches Rwy is always used for minima calculation. But pictures above confused me for non-precision stuff.
For straight-in minimums, precision or non-precision the Touchdown Elevation is used. For approaches with only circle to land minimums airport elevation is used.
aterpster is offline  
Reply With Quote
Old 18th Mar 2018, 20:03
  #5 (permalink)  
Thread Starter
 
Join Date: Dec 2007
Location: Aviation Street 72
Age: 38
Posts: 150
Thanks again @aterpster.

I do still have a question about one app chart which has only circle to land minimums, but has also an rwy elevation of 1037', written below apt elev of 1039'. The actual rwy elevation on rwy 07 is 1039', so where came this figure of 1037' from? I have attached the charts below. Thanks
Attached Files
File Type: pdf
print (1).pdf (72.1 KB, 15 views)
File Type: pdf
print.pdf (46.7 KB, 13 views)
maximus610 is offline  
Reply With Quote
Old 19th Mar 2018, 00:40
  #6 (permalink)  
 
Join Date: Apr 2009
Location: On the Beach
Posts: 2,938
Originally Posted by maximus610 View Post
Thanks again @aterpster.

I do still have a question about one app chart which has only circle to land minimums, but has also an rwy elevation of 1037', written below apt elev of 1039'. The actual rwy elevation on rwy 07 is 1039', so where came this figure of 1037' from? I have attached the charts below. Thanks
The 1,039 is the approach end of the runway not the touchdown elevation. Check the RNAV straight-in IAP.
aterpster is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service