<< >> NASA ASRS Report 395170, March 1998

ATCT controller cites recurring ARTS data tag displacement equipment problem. Reporter perceives controller safety issue.

Attributes
ACN	395170
Time
Date	199803
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : gpt
State Reference	MS
Altitude	msl bound lower : 1000 msl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : gpt tracon : cae
Operator	general aviation : corporate
Make Model Name	Learjet 35
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : missed approach
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller non radar : 9 controller radar : 8
ASRS Report	395170
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other
Situations
ATC Facility	other physical facility procedure or policy : unspecified

Narrative:

This is an occurrence that has been going on for at least 1 yr and can really be a safety factor that could cause an aircraft accident and/or added stress to the air traffic controllers at the facility. The artsiia data tag displaces to another position on the radar scope (while displaying mode C), anywhere from 2-10 mi from airport. This displaced data tag has been known to appear in front of another aircraft causing the controller to get confused and wonder how the airplane was able to get where the data tag was displayed. No corrective actions appear to have been taken. One local controller representative has recorded numerous reports we have received.

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Original NASA ASRS Text

Title: ATCT CTLR CITES RECURRING ARTS DATA TAG DISPLACEMENT EQUIP PROB. RPTR PERCEIVES CTLR SAFETY ISSUE.

Narrative: THIS IS AN OCCURRENCE THAT HAS BEEN GOING ON FOR AT LEAST 1 YR AND CAN REALLY BE A SAFETY FACTOR THAT COULD CAUSE AN ACFT ACCIDENT AND/OR ADDED STRESS TO THE AIR TFC CTLRS AT THE FACILITY. THE ARTSIIA DATA TAG DISPLACES TO ANOTHER POS ON THE RADAR SCOPE (WHILE DISPLAYING MODE C), ANYWHERE FROM 2-10 MI FROM ARPT. THIS DISPLACED DATA TAG HAS BEEN KNOWN TO APPEAR IN FRONT OF ANOTHER ACFT CAUSING THE CTLR TO GET CONFUSED AND WONDER HOW THE AIRPLANE WAS ABLE TO GET WHERE THE DATA TAG WAS DISPLAYED. NO CORRECTIVE ACTIONS APPEAR TO HAVE BEEN TAKEN. ONE LCL CTLR REPRESENTATIVE HAS RECORDED NUMEROUS RPTS WE HAVE RECEIVED.

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.