Y'All,
The following is just a small sample of a mix of need to know, nice to know
and what to know. The fact that there is also a diagram in the book makes
it more understandable. I believe that the .3 RNP level and lower can only
be reached with WAAS or LAAS still in the works.

RNP stands for Required Navigational Performance. This is described and
illustrated on Page 1-13 of the
2004 FAA-H8261-1 Instrrument Procedures Handbook. What follows is just the
INTRODUCTION. Test
questions will be based on material from subsequent chapters.

---.3RPN is the 3/10 of a nautical mile to each side of the final approach
course center line required for aircraft and equipment certification. This
is both a performance and functional requirement.for IFR certification

---The total system error (TSE) allowed in the final approach airspace due
to navigational system errors (NSE) includes computation errors, display
errors and flight technical errors (FTE) must not exceed .3 of a nautical
mile to either side of the final approach course center line.as laid out in
the ICAO Manual (Doc 9613). These .3 RNP on the final approach course (FAC)
and for the following air route areas must be both repeatable and
predictable to the declared levels of accuracy. For departure (1.0 RNP),
RNP 2.0.enroute, RNP 1.0 termina arrival and RNP 0.3 approach.

---The International Civil Aviation Organization (ICAO) uses RNP type for
airspace known as RNP-.0, RNP-4.0,
RPN-5.0 and RNP-10.0 The required performance is obtained through a
combination of aircraft capability and level of service provided by the
navigation infrastructor

---The following equation applies: Aircraft Capability + Level of Service =
Access

---RPN 0.3 is the lowest U.S. normal RNAV operation but special procedures
procedures use lower RNP levels.

Sample questions
1.What parts of the NAS have the same RPN?

2. What factors are included in finding the TSE due to NSE besidesFTE?

3. What part does the air route play in RNAV RNP levels?

4. Where do the ICAO and NAS have common RNPs?

5. How does the RNP 2.0 relate to airway width?