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Air carrier reporter complains of inadequate on board navigation capability for navigation over the gulf of mexico. Gross navigation error.
| Attributes | |
| ACN | 200370 |
| Time | |
| Date | 199201 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : vuh |
| State Reference | TX |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : msp |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Navigation In Use | other ndb |
| Flight Phase | cruise other |
| Route In Use | enroute : direct enroute : other oceanic enroute airway : a766 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 12000 flight time type : 7000 |
| ASRS Report | 200370 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | faa : reviewed incident with flight crew faa : investigated |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | other physical facility |
Narrative:
Our ADF needles on our RMI showed us on course, although the needles were fluctuating. At 190 mi from the scholes VOR, we received the VOR's signal and our course bar showed us right of course. We started correcting immediately. We reported abeam of the barow intersection. ATC asked us to indent, which we did. They cleared us to sabina pass. Approximately 3 mins later, ATC informed us that we were 29 mi east of A766 airway when they picked our aircraft up on radar the controller informed us that he was filing an oceanic navigation error report. The problem stems from the fact that we are still using ADF as our primary navigational aid across the gulf of mexico. Sometimes it works good, but most of the time it is marginal at best. When there is convective WX, they are unusable for navigation. We need updated navigational equipment in our aircraft, ie, omega.
Original NASA ASRS Text
Title: ACR RPTR COMPLAINS OF INADEQUATE ON BOARD NAV CAPABILITY FOR NAV OVER THE GULF OF MEXICO. GROSS NAV ERROR.
Narrative: OUR ADF NEEDLES ON OUR RMI SHOWED US ON COURSE, ALTHOUGH THE NEEDLES WERE FLUCTUATING. AT 190 MI FROM THE SCHOLES VOR, WE RECEIVED THE VOR'S SIGNAL AND OUR COURSE BAR SHOWED US R OF COURSE. WE STARTED CORRECTING IMMEDIATELY. WE RPTED ABEAM OF THE BAROW INTXN. ATC ASKED US TO INDENT, WHICH WE DID. THEY CLRED US TO SABINA PASS. APPROX 3 MINS LATER, ATC INFORMED US THAT WE WERE 29 MI E OF A766 AIRWAY WHEN THEY PICKED OUR ACFT UP ON RADAR THE CTLR INFORMED US THAT HE WAS FILING AN OCEANIC NAV ERROR RPT. THE PROBLEM STEMS FROM THE FACT THAT WE ARE STILL USING ADF AS OUR PRIMARY NAVIGATIONAL AID ACROSS THE GULF OF MEXICO. SOMETIMES IT WORKS GOOD, BUT MOST OF THE TIME IT IS MARGINAL AT BEST. WHEN THERE IS CONVECTIVE WX, THEY ARE UNUSABLE FOR NAV. WE NEED UPDATED NAVIGATIONAL EQUIP IN OUR ACFT, IE, OMEGA.
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.