A pilot inadvertently enters class C airspace.

Attributes
ACN	523780
Time
Date	200109
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cos.airport
State Reference	CO
Altitude	msl single value : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cardinal 177/177RG
Flight Phase	climbout : intermediate altitude cruise : level
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tracon : cos.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 20 flight time total : 1100 flight time type : 300
ASRS Report	523780
Events
Anomaly	airspace violation : entry non adherence : far non adherence : clearance other spatial deviation
Resolutory Action	controller : issued advisory flight crew : returned to intended or assigned course
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While climbing from 7700 ft MSL (from 00V) to 10500 ft MSL, using brk VOR as reference, cos departure radar controller requested aircraft departing 00V remain clear of cos class C airspace. I called cos departure on 124.0 identing myself. I remained north of brk VOR visually and continued my climb. Cos departure assigned me a squawk code and idented me by call sign. I confirmed radar contact, but apparently the cos departure still had not cleared me through the north edge of the class C airspace. He called me and reminded me that he had not cleared me through his airspace and I had penetrated 1-2 NM on the northern edge. He reported me 8 NM north of cos airport. An MD80 departed cos. Factors: aircraft not equipped with GPS or DME. Visual navigation with respect to bfk VOR not accurate enough. Corrective action: steer further north of brk VOR when given a class C airspace restr. Purchase GPS or DME.

Original NASA ASRS Text

Title: A PLT INADVERTENTLY ENTERS CLASS C AIRSPACE.

Narrative: WHILE CLBING FROM 7700 FT MSL (FROM 00V) TO 10500 FT MSL, USING BRK VOR AS REF, COS DEP RADAR CTLR REQUESTED ACFT DEPARTING 00V REMAIN CLR OF COS CLASS C AIRSPACE. I CALLED COS DEP ON 124.0 IDENTING MYSELF. I REMAINED N OF BRK VOR VISUALLY AND CONTINUED MY CLB. COS DEP ASSIGNED ME A SQUAWK CODE AND IDENTED ME BY CALL SIGN. I CONFIRMED RADAR CONTACT, BUT APPARENTLY THE COS DEP STILL HAD NOT CLRED ME THROUGH THE N EDGE OF THE CLASS C AIRSPACE. HE CALLED ME AND REMINDED ME THAT HE HAD NOT CLRED ME THROUGH HIS AIRSPACE AND I HAD PENETRATED 1-2 NM ON THE NORTHERN EDGE. HE RPTED ME 8 NM N OF COS ARPT. AN MD80 DEPARTED COS. FACTORS: ACFT NOT EQUIPPED WITH GPS OR DME. VISUAL NAV WITH RESPECT TO BFK VOR NOT ACCURATE ENOUGH. CORRECTIVE ACTION: STEER FURTHER N OF BRK VOR WHEN GIVEN A CLASS C AIRSPACE RESTR. PURCHASE GPS OR DME.

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.