You really need to read the entire section not just pick out numbers. Here is a link so you can read the entire section. I include some small bits to peak your intrest.
http://www.faa.gov/library/manuals/aviation/instrument_procedures_handbook/media/APPENDIX-B.pdf
Page B1
Some pilots assume that flying to the tolerances set out in the FAA Instrument Practical Test Standards (PTS) (http://www.faa.gov/education_research/testing/airmen/ test_standards/) will keep them within protected airspace. As a result, it is important to observe the last sentence of the following note in the PTS: “The tolerances stated in this standard are intended to be used as a measurement of the applicant's ability to operate in the instrument environment. They provide guidance for examiners to use in judging the applicant's qualifications. The regulations governing the tolerances for operation under Instrument Flight Rules (IFR) are established in 14 CFR Part 91.”
The in-flight presentation of course data can vary widely based upon the selection and distance from a Navigational Aid (NAVAID) or airfield. Consequently, you need to understand that in some cases, flying to the same standards required during your instrument rating flight test does not necessarily ensure that your aircraft will remain within protected airspace during IFR operations or that your aircraft will be in a position from which descent to a landing can be made using normal maneuvers.
Page B5
In the AIM “established” is defined as “to be stable or fixed on a route, route segment, altitude, heading, etc.” The “on course” concept for IFR is spelled out in Part 91.181, which states that the course to be flown on an airway is the centerline of the airway, and on any other route, along the direct course between the NAVAIDS or fixes defining that route.
http://www.faa.gov/library/manuals/aviation/instrument_procedures_handbook/media/APPENDIX-B.pdf
Page B1
Some pilots assume that flying to the tolerances set out in the FAA Instrument Practical Test Standards (PTS) (http://www.faa.gov/education_research/testing/airmen/ test_standards/) will keep them within protected airspace. As a result, it is important to observe the last sentence of the following note in the PTS: “The tolerances stated in this standard are intended to be used as a measurement of the applicant's ability to operate in the instrument environment. They provide guidance for examiners to use in judging the applicant's qualifications. The regulations governing the tolerances for operation under Instrument Flight Rules (IFR) are established in 14 CFR Part 91.”
The in-flight presentation of course data can vary widely based upon the selection and distance from a Navigational Aid (NAVAID) or airfield. Consequently, you need to understand that in some cases, flying to the same standards required during your instrument rating flight test does not necessarily ensure that your aircraft will remain within protected airspace during IFR operations or that your aircraft will be in a position from which descent to a landing can be made using normal maneuvers.
Page B5
In the AIM “established” is defined as “to be stable or fixed on a route, route segment, altitude, heading, etc.” The “on course” concept for IFR is spelled out in Part 91.181, which states that the course to be flown on an airway is the centerline of the airway, and on any other route, along the direct course between the NAVAIDS or fixes defining that route.
