A reporter submits a suggestion to enhance the accuracy and use of timing to the missed approach poi...

Attributes
ACN	353533
Time
Date	199611
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bdl
State Reference	CT
Environment
Flight Conditions	IMC
Aircraft 1
Operator	general aviation : corporate
Make Model Name	S-76/S-76 Mark II
Operating Under FAR Part	Part 91
Navigation In Use	Other
Flight Phase	landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 13000 flight time type : 8000
ASRS Report	353533
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

With more and more aircraft having GPS onboard, all approachs (instrument) should have the missed approach point idented by latitude and longitude coordinates. Using GPS coordinates for the missed approach point is a great deal more accurate than relying on time, when executing a non precision approach. GPS at the most is off a few 100 ft. By identing the missed approach point using GPS coordinates safety will be increased a great deal when flying instrument approachs because there will be no question about when to execute the missed approach. Callback conversation with reporter revealed the following information: reporter flies an SK76. Before a GPS approach was approved at an airport that this reporter commonly utilizes, he was entirely reliant upon the use of time to identify the missed approach point while flying the NDB approach. The introduction of the GPS stand alone approach gave this pilot the assurance of greater accuracy in low WX conditions and this experience in turn provided the impetus to file this idea of using GPS in addition to time, to identify the missed approach point.

Original NASA ASRS Text

Title: A RPTR SUBMITS A SUGGESTION TO ENHANCE THE ACCURACY AND USE OF TIMING TO THE MISSED APCH POINT (NON PRECISION APCHS) BY PUBLISHING SUPPLEMENTAL GLOBAL POSITIONING SYS WAYPOINT IDENT THAT CAN BE USED IN CONJUNCTION WITH THE TIME.

Narrative: WITH MORE AND MORE ACFT HAVING GPS ONBOARD, ALL APCHS (INST) SHOULD HAVE THE MISSED APCH POINT IDENTED BY LATITUDE AND LONGITUDE COORDINATES. USING GPS COORDINATES FOR THE MISSED APCH POINT IS A GREAT DEAL MORE ACCURATE THAN RELYING ON TIME, WHEN EXECUTING A NON PRECISION APCH. GPS AT THE MOST IS OFF A FEW 100 FT. BY IDENTING THE MISSED APCH POINT USING GPS COORDINATES SAFETY WILL BE INCREASED A GREAT DEAL WHEN FLYING INST APCHS BECAUSE THERE WILL BE NO QUESTION ABOUT WHEN TO EXECUTE THE MISSED APCH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR FLIES AN SK76. BEFORE A GPS APCH WAS APPROVED AT AN ARPT THAT THIS RPTR COMMONLY UTILIZES, HE WAS ENTIRELY RELIANT UPON THE USE OF TIME TO IDENT THE MISSED APCH POINT WHILE FLYING THE NDB APCH. THE INTRODUCTION OF THE GPS STAND ALONE APCH GAVE THIS PLT THE ASSURANCE OF GREATER ACCURACY IN LOW WX CONDITIONS AND THIS EXPERIENCE IN TURN PROVIDED THE IMPETUS TO FILE THIS IDEA OF USING GPS IN ADDITION TO TIME, TO IDENT THE MISSED APCH POINT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

A reporter submits a suggestion to enhance the accuracy and use of timing to the missed approach point (non precision approachs) by publishing supplemental global positioning system waypoint identify that can be used in conjunction with the time.