AVSIG: 30/90 degree intercept? wwswsigarch.jpg (7236 bytes)

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AVSIG Discussion Sections >> Air Traffic Control

Ray Tackett
Top Gun


Reged: 04/30/04
Posts: 8892
Loc: Philadelphia, USA
30/90 degree intercept?
      07/23/17 10:02 PM

I was always taught and received 30 degrees or less, except ...

I have requested and gotten a more challenging intercept to save myself some
time or to help make sequencing work. I also would not take it amiss if ATC
asked whether it would be possible to fly such an intercept.

The 90 degree RNAV deal gets a lot of GPS help. The GPS looks at the ground
speed and figures out the turn lead for the pilot. I've never tried such on
an ILS, but have mentally worked out a conservative* turn lead.

* Conservative == a lead where I might have to shallow the bank angle to
complete the intercept rather than possibly getting into an excessively tight
turn to avoid an overshoot.

That said, the cockpit, especially solo IFR, is not a good place to be doing
math. Easy intercepts, e.g. "Join the localizer" when I'm fifty miles out
(has happened when coming from the right direction), can be a big help to the
pilot.

--------------------
Ray,

Owner, Lake Wood Be Gone

Turning quality lumber into sawdust and noise since 2013.

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Entire topic
Subject Posted by Posted on
* 30/90 degree intercept? Stephen Loeffler (SoCal TRACON) 07/23/17 09:34 PM
. * * Re: 30/90 degree intercept? Scott Dunham (RDU)   07/25/17 02:37 AM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/25/17 03:36 PM
. * * Re: 30/90 degree intercept? Kcid LlirreM   07/27/17 08:35 AM
. * * Re: 30/90 degree intercept? B. Butler (Oregonian)   07/31/17 05:55 PM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/28/17 03:53 AM
. * * Re: 30/90 degree intercept? Scott Dunham (RDU)   07/30/17 10:32 AM
. * * Re: 30/90 degree intercept? Scott Dunham (RDU)   07/26/17 01:38 AM
. * * Re: 30/90 degree intercept? sreyoB yrraL   07/26/17 05:06 AM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/26/17 03:54 PM
. * * Re: 30/90 degree intercept? sreyoB yrraL   07/27/17 12:57 AM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/28/17 03:44 AM
. * * Re: 30/90 degree intercept? sreyoB yrraL   07/28/17 10:30 AM
. * * Re: 30/90 degree intercept? Scott Dunham (RDU)   07/26/17 12:44 PM
. * * Re: 30/90 degree intercept? Jeff Hartmann CIC   07/26/17 02:29 PM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/26/17 03:55 PM
. * * Re: 30/90 degree intercept? Jeff Hartmann CIC   07/27/17 02:08 AM
. * * Re: 30/90 degree intercept? sreyoB yrraL   07/25/17 10:10 AM
. * * Re: 30/90 degree intercept? Scott Dunham (RDU)   07/26/17 01:41 AM
. * * Re: 30/90 degree intercept? Todd Alfes   07/24/17 10:08 PM
. * * Re: 30/90 degree intercept? sreyoB yrraL   07/23/17 11:17 PM
. * * Re: 30/90 degree intercept? Todd Alfes   07/24/17 10:33 PM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/24/17 11:24 AM
. * * Re: 30/90 degree intercept? sreyoB yrraL   07/24/17 11:35 AM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/25/17 03:50 PM
. * * Re: 30/90 degree intercept? sreyoB yrraL   07/25/17 07:31 PM
. * * Re: 30/90 degree intercept? Stephen Loeffler (SoCal TRACON)   07/24/17 12:04 AM
. * * 30/90 degree intercept? Ray Tackett   07/23/17 10:02 PM

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