Originally Posted by
galaxy flyer
Within "1 Dot" comes from ICAO's definition of "on course"; or +\- 5 degrees for NDB. Check PANS-OPS Doc 8168, Vol 1. Technically, the FAA's position is that "on course" is needle centered, 1 dot off course and intercepting is technique to lead the intercept of the course, not "on course".
GF
GF -
While looking up some of the things discussed today with a fellow worker he pointed out to me the passage in the 'Instrument Procedures Handbook' which defined 'on course' as [1 dot]. I wrote down the reference manual and page number but don't have it with me now. That same paragraph also mentions the +/- 5 deg of oncourse bearing for the NDB as you mention above. Maybe this is another area where the FAA has adopted ICAO standards of recent?
USMCFLYR