Airbubba : we are talking 2 different things, I was reffering to the global 0.1NM EMBEDDED in the FMS to counter GPS nav accurracy. ( disccussed in ICAO on initiative IFALPA ATS committe after the Sioux Lookout collision in 1995.) long debate about it, also here on PPRuNe . But off topic .
Thanks for the clarification, I appreciate it.
Hmmm, this .1 nm offset must not have made it to the real world. When FMS planes with GPS pass in opposite directions on the airway they are certainly not 600 or 1200 feet offset in my experience.