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A PA28 private pilot complains of the map display problem on the atl sectional as not depicting a ridge that created a possible class C incursion 9 southwest of tys, tn.
| Attributes | |
| ACN | 486130 |
| Time | |
| Date | 200009 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : tys.airport |
| State Reference | TN |
| Altitude | msl bound lower : 4000 msl bound upper : 4500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : tys.tracon |
| Operator | general aviation : personal |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : v267.airway |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Experience | flight time last 90 days : 20 flight time total : 1306 flight time type : 1202 |
| ASRS Report | 486130 |
| Events | |
| Anomaly | airspace violation : entry non adherence : far other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited penetrated airspace flight crew : took evasive action |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure Chart Or Publication |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Proceeding from the calderwood dam vicinity south of knoxville, tn, on the atlanta sectional, it appears that you will pass the last high terrain before reaching class C airspace. However, the outer circle (10 mi) magenta coloring hides a ridge on the chart. Where V267 intersects the class C airspace this higher ridge is hidden by the blue airway, magenta circle and the #27 for runway length at montvale (private) airport. I expected sufficient clearance to maintain the 2000 ft above surface as requested by the national park service and still be under the class C airspace. As I approached that point, it did not appear that this was possible, so I turned northeast to avoid class C, but may not have turned quick enough due to confusion of position caused by chart. The class C should be altered with a 2 mi clearance parallel to the ridge to provide VFR corridor. This area is not in alignment with tys arrs or departures.
Original NASA ASRS Text
Title: A PA28 PVT PLT COMPLAINS OF THE MAP DISPLAY PROB ON THE ATL SECTIONAL AS NOT DEPICTING A RIDGE THAT CREATED A POSSIBLE CLASS C INCURSION 9 SW OF TYS, TN.
Narrative: PROCEEDING FROM THE CALDERWOOD DAM VICINITY S OF KNOXVILLE, TN, ON THE ATLANTA SECTIONAL, IT APPEARS THAT YOU WILL PASS THE LAST HIGH TERRAIN BEFORE REACHING CLASS C AIRSPACE. HOWEVER, THE OUTER CIRCLE (10 MI) MAGENTA COLORING HIDES A RIDGE ON THE CHART. WHERE V267 INTERSECTS THE CLASS C AIRSPACE THIS HIGHER RIDGE IS HIDDEN BY THE BLUE AIRWAY, MAGENTA CIRCLE AND THE #27 FOR RWY LENGTH AT MONTVALE (PVT) ARPT. I EXPECTED SUFFICIENT CLRNC TO MAINTAIN THE 2000 FT ABOVE SURFACE AS REQUESTED BY THE NATL PARK SVC AND STILL BE UNDER THE CLASS C AIRSPACE. AS I APCHED THAT POINT, IT DID NOT APPEAR THAT THIS WAS POSSIBLE, SO I TURNED NE TO AVOID CLASS C, BUT MAY NOT HAVE TURNED QUICK ENOUGH DUE TO CONFUSION OF POS CAUSED BY CHART. THE CLASS C SHOULD BE ALTERED WITH A 2 MI CLRNC PARALLEL TO THE RIDGE TO PROVIDE VFR CORRIDOR. THIS AREA IS NOT IN ALIGNMENT WITH TYS ARRS OR DEPS.
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.