Air carrier medium large transport track heading deviation on SID with vector out of sfo.

Attributes
ACN	191869
Time
Date	199110
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 1600 msl bound upper : 5000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 7240 flight time type : 440
ASRS Report	191869
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation Pilot Deviation other

Narrative:

During climb out from sfo on the offshore 1 SID, bay departure issued us a heading of 120 degree to intercept the pye 151 radial and continue on the rzs transition. It was only as we continued our turn to 120 degree that we both realized that we were crossing the 130 (approximately) of pye. Continuing to a heading of 120 as assigned would take on a diverging course away from the 151 degree pye as depicted on the SID. Simultaneously, as we discovered this discrepancy bay departure asked us if we 'weren't assigned a heading of 210 degree to intercept pye 151 degree radial?' I responded 'no sir, you gave us heading 120 degree to intercept.' bay departure then responded, 'I gave you heading 210 degree to intercept the point reyes 151 degree radial, track outbound and resume the san marcus transition. Turn right now to 210 degree to intercept pye 151 degree.' both the captain and I, heard, understood, and read back bay departures initial 120 degree heading. I believe had we both been more familiar with the offshore 1 departure and our relationship to point reyes, we would have queried bay departures assigned heading of 120 degree, and discovered the controller's mistake much sooner. More verbalization in the cockpit may aid in this matter. As a final result of ATC's misstated vector, no conflict with other traffic occurred.

Original NASA ASRS Text

Title: ACR MLG TRACK HDG DEV ON SID WITH VECTOR OUT OF SFO.

Narrative: DURING CLBOUT FROM SFO ON THE OFFSHORE 1 SID, BAY DEP ISSUED US A HDG OF 120 DEG TO INTERCEPT THE PYE 151 RADIAL AND CONTINUE ON THE RZS TRANSITION. IT WAS ONLY AS WE CONTINUED OUR TURN TO 120 DEG THAT WE BOTH REALIZED THAT WE WERE XING THE 130 (APPROX) OF PYE. CONTINUING TO A HDG OF 120 AS ASSIGNED WOULD TAKE ON A DIVERGING COURSE AWAY FROM THE 151 DEG PYE AS DEPICTED ON THE SID. SIMULTANEOUSLY, AS WE DISCOVERED THIS DISCREPANCY BAY DEP ASKED US IF WE 'WEREN'T ASSIGNED A HDG OF 210 DEG TO INTERCEPT PYE 151 DEG RADIAL?' I RESPONDED 'NO SIR, YOU GAVE US HDG 120 DEG TO INTERCEPT.' BAY DEP THEN RESPONDED, 'I GAVE YOU HDG 210 DEG TO INTERCEPT THE POINT REYES 151 DEG RADIAL, TRACK OUTBOUND AND RESUME THE SAN MARCUS TRANSITION. TURN R NOW TO 210 DEG TO INTERCEPT PYE 151 DEG.' BOTH THE CAPT AND I, HEARD, UNDERSTOOD, AND READ BACK BAY DEPS INITIAL 120 DEG HDG. I BELIEVE HAD WE BOTH BEEN MORE FAMILIAR WITH THE OFFSHORE 1 DEP AND OUR RELATIONSHIP TO POINT REYES, WE WOULD HAVE QUERIED BAY DEPS ASSIGNED HDG OF 120 DEG, AND DISCOVERED THE CTLR'S MISTAKE MUCH SOONER. MORE VERBALIZATION IN THE COCKPIT MAY AID IN THIS MATTER. AS A FINAL RESULT OF ATC'S MISSTATED VECTOR, NO CONFLICT WITH OTHER TFC OCCURRED.

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.