B757 PIC misread, briefed and initially flew 185 degree vice 158 degree SID radial.

Attributes
ACN	393210
Time
Date	199802
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground : preflight ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	other other : other pilot : atp pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 500
ASRS Report	393210
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	other other : other pilot : atp
Experience	flight time last 90 days : 350 flight time total : 9000 flight time type : 300
ASRS Report	394080
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Deviated off of the required 158 degree radial for a short distance because I misread the radial as 185 degrees. Briefed 185 degrees at the gate, before takeoff and again questioned the first officer during takeoff if 185 degrees was correct. Track and FMS did not seem right. Returned to the correct radial almost immediately after picking up a 185 degree heading -- never did intercept the 185 degree. We were back on the 158 degree within 3 DME. We possibly exceeded the noise corridor. We continually xchk each other and an obvious mistake was immediately corrected.

Original NASA ASRS Text

Title: B757 PIC MISREAD, BRIEFED AND INITIALLY FLEW 185 DEG VICE 158 DEG SID RADIAL.

Narrative: DEVIATED OFF OF THE REQUIRED 158 DEG RADIAL FOR A SHORT DISTANCE BECAUSE I MISREAD THE RADIAL AS 185 DEGS. BRIEFED 185 DEGS AT THE GATE, BEFORE TKOF AND AGAIN QUESTIONED THE FO DURING TKOF IF 185 DEGS WAS CORRECT. TRACK AND FMS DID NOT SEEM RIGHT. RETURNED TO THE CORRECT RADIAL ALMOST IMMEDIATELY AFTER PICKING UP A 185 DEG HDG -- NEVER DID INTERCEPT THE 185 DEG. WE WERE BACK ON THE 158 DEG WITHIN 3 DME. WE POSSIBLY EXCEEDED THE NOISE CORRIDOR. WE CONTINUALLY XCHK EACH OTHER AND AN OBVIOUS MISTAKE WAS IMMEDIATELY CORRECTED.

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.