Don't know, but if you are using the runway heading to judge whether
your compass reading is in error, remember that runway headings are not
always true. There are other ways to calibrate your compass.

Casey Wilson wrote:
My FARAIM is at my daughter's house and I can't find anything on the 'net to
answer my questions. Please indulge me....

Scenario:
1) line up with runway centerline[for my hypothetical, the runway is
dead nuts to the compass]
2) note compass heading
3) add/subtract compass card correction

Questions:
1) How much error is allowable between known heading and corrected
compass reading?
2) Does a significant error down the airplane as unworthy?
3) Where can I find applicable references?