SDF Approach?

[A Guy Called Tyketto]

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I was just thumbing through a publication my fiance happen to
subscribe for me as a birthday present, and they had an ad in there for
the Big South Fork Airpark/Scott Municipal, in Oneida, TN (KSCX). In
wanting to find out more about it, I pull it up on Airnav, and see that
Runway 23 has an SDF approach. It looks like a LOC approach, no OM, MM,
IM, or glideslope. So my question is, what exactly is this type of
approach, and how does it differ from a LOC approach?

BL.
- --
Brad Littlejohn | Email:
Unix Systems Administrator, |
Web + NewsMaster, BOFH.. Smeghead! :) | http://www.wizard.com/~tyketto
PGP: 1024D/E319F0BF 6980 AAD6 7329 E9E6 D569 F620 C819 199A E319 F0BF

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[John Godwin]

A Guy Called Tyketto > wrote in
t:

> In wanting to find out more about it, I pull it up on
> Airnav, and see that Runway 23 has an SDF approach. It looks like
> a LOC approach, no OM, MM, IM, or glideslope. So my question is,
> what exactly is this type of approach, and how does it differ from
> a LOC approach?

The Simplified Directional Facility is similar to a Localizer but may
be offset from the runway and the course may be wider than a Localizer.

--

[swag]

On Apr 17, 12:04 am, A Guy Called Tyketto
> wrote:
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>
> I was just thumbing through a publication my fiance happen to
> subscribe for me as a birthday present, and they had an ad in there for
> the Big South Fork Airpark/Scott Municipal, in Oneida, TN (KSCX). In
> wanting to find out more about it, I pull it up on Airnav, and see that
> Runway 23 has an SDF approach. It looks like a LOC approach, no OM, MM,
> IM, or glideslope. So my question is, what exactly is this type of
> approach, and how does it differ from a LOC approach?
>
> BL.
> - --
> Brad Littlejohn | Email:
> Unix Systems Administrator, |
> Web + NewsMaster, BOFH.. Smeghead! :) | http://www.wizard.com/~tyketto
> PGP: 1024D/E319F0BF 6980 AAD6 7329 E9E6 D569 F620 C819 199A E319 F0BF
>
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/the course is not as accurate (wider), otherwise probably close to
the same

[A Guy Called Tyketto]

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Thank you both, John and Swag. This has been very educating.
I'll have to go out there one of these days to see it in use.

BL.
- --
Brad Littlejohn | Email:
Unix Systems Administrator, |
Web + NewsMaster, BOFH.. Smeghead! :) | http://www.wizard.com/~tyketto
PGP: 1024D/E319F0BF 6980 AAD6 7329 E9E6 D569 F620 C819 199A E319 F0BF

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[Mortimer Schnerd, RN[_2_]]

John Godwin wrote:
>> In wanting to find out more about it, I pull it up on
>> Airnav, and see that Runway 23 has an SDF approach. It looks like
>> a LOC approach, no OM, MM, IM, or glideslope. So my question is,
>> what exactly is this type of approach, and how does it differ from
>> a LOC approach?
>
> The Simplified Directional Facility is similar to a Localizer but may
> be offset from the runway and the course may be wider than a Localizer.


The important thing to know is that you fly it just like you fly a localizer...
just don't be surprised if the runway is angled away from you a little bit when
you break out. I used to have to fly an SDF approach into Greenville, NC all
the time. Washington Center would give radar vectors until I picked up the NDB
that was the IAF for the approach, then it was all on me.



--
Mortimer Schnerd, RN
mschnerdatcarolina.rr.com

[Larry Dighera]

On Tue, 17 Apr 2007 05:45:40 -0000, John Godwin
> wrote in
>:

>
>The Simplified Directional Facility is similar to a Localizer but may
>be offset from the runway and the course may be wider than a Localizer.

How does an SDF approach differ from an Localizer-type Directional Aid
(LDA) approach?

[Ron Natalie]

Larry Dighera wrote:
> On Tue, 17 Apr 2007 05:45:40 -0000, John Godwin
> > wrote in
> >:
>
>> The Simplified Directional Facility is similar to a Localizer but may
>> be offset from the runway and the course may be wider than a Localizer.
>
> How does an SDF approach differ from an Localizer-type Directional Aid
> (LDA) approach?

A LOC (whether aligned with the runway or LDA) will have a tighter
width. While it varies in angular dimension because from approach
to approach, the loc angular width is about 3 degrees. The SDF
is 6 or 12.

[Larry Dighera]

On Tue, 17 Apr 2007 07:08:08 -0400, Ron Natalie >
wrote in >:

>Larry Dighera wrote:
>> On Tue, 17 Apr 2007 05:45:40 -0000, John Godwin
>> > wrote in
>> >:
>>
>>> The Simplified Directional Facility is similar to a Localizer but may
>>> be offset from the runway and the course may be wider than a Localizer.
>>
>> How does an SDF approach differ from an Localizer-type Directional Aid
>> (LDA) approach?
>
>A LOC (whether aligned with the runway or LDA) will have a tighter
>width. While it varies in angular dimension because from approach
>to approach, the loc angular width is about 3 degrees. The SDF
>is 6 or 12.

Thanks. My instrument training didn't cover SDF approaches. Are they
new or just few in number?

[Mortimer Schnerd, RN[_2_]]

Larry Dighera wrote:
>> A LOC (whether aligned with the runway or LDA) will have a tighter
>> width. While it varies in angular dimension because from approach
>> to approach, the loc angular width is about 3 degrees. The SDF
>> is 6 or 12.
>
> Thanks. My instrument training didn't cover SDF approaches. Are they
> new or just few in number?


Old; few in number. Very few in number.



--
Mortimer Schnerd, RN
mschnerdatcarolina.rr.com

[Ron Natalie]

Mortimer Schnerd, RN wrote:
> Larry Dighera wrote:
>>> A LOC (whether aligned with the runway or LDA) will have a tighter
>>> width. While it varies in angular dimension because from approach
>>> to approach, the loc angular width is about 3 degrees. The SDF
>>> is 6 or 12.
>> Thanks. My instrument training didn't cover SDF approaches. Are they
>> new or just few in number?
>
>
> Old; few in number. Very few in number.
>
>
Something like 26 in the entire country.