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Update which SDF are currently operational
double-checked the currency of the list of SDF approaches in US; better references; removed unreferenced information that was too detailed
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Usable off-course indications are limited to 35 degrees either side of the course centerline.
Usable off-course indications are limited to 35 degrees either side of the course centerline.


==Current SDF approaches in the United States==
== Current SDF approaches in the United States ==
The following SDF approaches are published in the United States (as of June 2011):<ref>{{cite web | url=http://www.aeronav.faa.gov/index.asp?xml=aeronav/applications/d_tpp | title=digital - Terminal Procedures Publication (d-TPP)/Airport Diagrams | publisher=[[Federal Aviation Administration|FAA]] | accessdate=2011-06-14}}</ref>
The following 11 SDF approaches in four states are currently published in the United States (currently only 7 are operational):
* KAAS SDF RWY 23, [[Taylor County Airport (Kentucky)|Taylor County Airport]], Campbellsville, KY (SDF unmonitored 1700-0800, currently out of service)
# KAAS, SDF RWY 23, [[Taylor County Airport (Kentucky)|Taylor County Airport]], Campbellsville, KY (out of service<ref>Per [[NOTAM]] "!LOU 11/134", which is active since 2009-11-18 "until further notice" (as of 2011-06-14)</ref>)
* KGLW SDF RWY 07, [[Glasgow Municipal Airport]], Glasgow, KY (SDF unmonitored 1600-0700, currently out of service)
# KGLW, SDF RWY 07, [[Glasgow Municipal Airport]], Glasgow, KY (out of service<ref>Per [[NOTAM]] "!LOU 12/210", which is active since 2010-12-23 "until further notice" (as of 2011-06-14)</ref>)
* KLBO SDF RWY 36, [[Floyd W. Jones Lebanon Airport]], Lebanon, MO (Course width: 6.00 degrees, SDF/DME unmonitored)
# KLBO, SDF RWY 36, [[Floyd W. Jones Lebanon Airport]], Lebanon, MO
* KPOF SDF RWY 36, [[Poplar Bluff Municipal Airport]], Poplar Bluff, MO (Course width: 6.00 degrees)
# KPOF, SDF RWY 36, [[Poplar Bluff Municipal Airport]], Poplar Bluff, MO
* KFYM SDF RWY 20, [[Fayetteville Municipal Airport (Tennessee)|Fayetteville Municipal Airport]]. Fayetteville, TN (Course width: 6.00 degrees, SDF unmonitored 1700-0800, currently out of service)
# KFYM, SDF RWY 20, [[Fayetteville Municipal Airport (Tennessee)|Fayetteville Municipal Airport]], Fayetteville, TN (out of service<ref>Per [[NOTAM]] "!MKL 09/022", which is active since 2009-09-03 "until further notice" (as of 2011-06-14)</ref>)
* KMOR SDF RWY 05, [[Moore-Murrell Airport]], Morristown, TN (SDF unmonitored 2100-0700)
# KMOR, SDF RWY 05, [[Moore-Murrell Airport]], Morristown, TN
* KSCX SDF RWY 23, [[Scott Municipal Airport]], Oneida, TN (SDF unmonitored 1730-0830, currently out of service)
# KSCX, SDF RWY 23, [[Scott Municipal Airport]], Oneida, TN (out of service<ref>Per [[NOTAM]] "!BNA 05/300", which is active since 2008-05-24 "until further notice" (as of 2011-06-14)</ref>)
* KTHA SDF RWY 18, [[Tullahoma Regional Airport]]/William Northern Field. Tullahoma, TN (Course width: 6.00 degrees, SDF unmonitored 1800-0800 and at other times the airport is unattended)
# KTHA, SDF RWY 18, [[Tullahoma Regional Airport|Tullahoma Regional Airport/William Northern Field]], Tullahoma, TN
* KMFI SDF RWY 34, [[Marshfield Municipal Airport (Wisconsin)|Marshfield Municipal Airport]], Marshfield, WI
# KMFI, SDF RWY 34, [[Marshfield Municipal Airport (Wisconsin)|Marshfield Municipal Airport]], Marshfield, WI
* KSUE SDF RWY 02, [[Door County Cherryland Airport]], Sturgeon Bay, WI (SDF unmonitored and unusable beyond 12 degrees right of course)
# KSUE, SDF RWY 02, [[Door County Cherryland Airport]], Sturgeon Bay, WI
* KISW SDF RWY 02, [[Alexander Field South Wood County Airport]], Wisconsin Rapids, WI, (Course width: 6.36 degrees, SDF unmonitored)
# KISW, SDF RWY 02, [[South Wood County Airport|Alexander Field–South Wood County Airport]], Wisconsin Rapids, WI


==See also==
== See also ==
* [[Instrument approach]]
* [[Instrument approach]]
* [[Instrument landing system]]
* [[Instrument landing system]]
* [[Localizer Type Directional Aid]]
* [[Localizer Type Directional Aid]]


==References==
== References ==
{{Reflist}}
* [http://www.faa.gov/ATpubs/AIM/index.htm Aeronautical Information Manual published annually by US Federal Aviation Administration]
* [http://www.faa.gov/air_traffic/publications/atpubs/aim/ Aeronautical Information Manual], published in US by [[Federal Aviation Administration]]
* [http://naco.faa.gov/index.asp?xml=naco/online/d_tpp FAA/NACO Digital Terminal Procedures Publication (d-TPP)/Airport Diagrams]
* [https://pilotweb.nas.faa.gov/PilotWeb/ FAA NOTAM website]


[[Category:Aviation terminology]]
[[Category:Aviation terminology]]

Revision as of 08:26, 14 June 2011

Simplified Directional Facility or SDF is similar to a Localizer, although is not as precise. The SDF signal is fixed at either 6 or 12 degrees, as necessary maximum flyability and optimum course quality. Unlike an Instrument Landing System, an SDF does not provide vertical guidance in the form of a glideslope. Therefore, it is a non-precision approach.

The SDF course may or may not be aligned with the runway because its antenna is sometimes offset from the runway centerline.

Usable off-course indications are limited to 35 degrees either side of the course centerline.

Current SDF approaches in the United States

The following SDF approaches are published in the United States (as of June 2011):[1]

  1. KAAS, SDF RWY 23, Taylor County Airport, Campbellsville, KY (out of service[2])
  2. KGLW, SDF RWY 07, Glasgow Municipal Airport, Glasgow, KY (out of service[3])
  3. KLBO, SDF RWY 36, Floyd W. Jones Lebanon Airport, Lebanon, MO
  4. KPOF, SDF RWY 36, Poplar Bluff Municipal Airport, Poplar Bluff, MO
  5. KFYM, SDF RWY 20, Fayetteville Municipal Airport, Fayetteville, TN (out of service[4])
  6. KMOR, SDF RWY 05, Moore-Murrell Airport, Morristown, TN
  7. KSCX, SDF RWY 23, Scott Municipal Airport, Oneida, TN (out of service[5])
  8. KTHA, SDF RWY 18, Tullahoma Regional Airport/William Northern Field, Tullahoma, TN
  9. KMFI, SDF RWY 34, Marshfield Municipal Airport, Marshfield, WI
  10. KSUE, SDF RWY 02, Door County Cherryland Airport, Sturgeon Bay, WI
  11. KISW, SDF RWY 02, Alexander Field–South Wood County Airport, Wisconsin Rapids, WI

See also

References

  1. ^ "digital - Terminal Procedures Publication (d-TPP)/Airport Diagrams". FAA. Retrieved 2011-06-14.
  2. ^ Per NOTAM "!LOU 11/134", which is active since 2009-11-18 "until further notice" (as of 2011-06-14)
  3. ^ Per NOTAM "!LOU 12/210", which is active since 2010-12-23 "until further notice" (as of 2011-06-14)
  4. ^ Per NOTAM "!MKL 09/022", which is active since 2009-09-03 "until further notice" (as of 2011-06-14)
  5. ^ Per NOTAM "!BNA 05/300", which is active since 2008-05-24 "until further notice" (as of 2011-06-14)


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