A B737-300 first officer reports a course deviation with the LNAV engaged.

Attributes
ACN	705649
Time
Date	200608
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : coate
State Reference	NJ
Altitude	msl single value : 34000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute airway : j36.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 170 flight time total : 5000 flight time type : 1000
ASRS Report	705649
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were cleared to coate intersection and then 'as filed' which would be J36 fnt. After coate intersection; ATC informed us we were 10 mi off course from J36. We turned right to re-intercept J36 and continued on course. We were in LNAV at the time.

Original NASA ASRS Text

Title: A B737-300 FO RPTS A COURSE DEV WITH THE LNAV ENGAGED.

Narrative: WE WERE CLRED TO COATE INTXN AND THEN 'AS FILED' WHICH WOULD BE J36 FNT. AFTER COATE INTXN; ATC INFORMED US WE WERE 10 MI OFF COURSE FROM J36. WE TURNED R TO RE-INTERCEPT J36 AND CONTINUED ON COURSE. WE WERE IN LNAV AT THE TIME.

Data retrieved from NASA's ASRS site as of January 2009 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.