Aeronautical Information Manual (AIM), page 276

Index   275 -- Page 276 -- 277


b. Pilots of Non-RNP 10 aircraft that operate in
GoMex CTA's must report the lack of authorization
by stating "Negative RNP 10":

1. On initial call to ATC in a GoMex CTA:

2. In read back of a clearance to climb to or
descend from cruise altitude. (See paragraph
4-7-4 e); and

3. When approval status is requested by the
controller. (See paragraph 4-7-8 e.)

c. Use of flight plan item 18 codes "PBN/A1" or

"PBN/L1" are restricted to operators and aircraft

specifically authorized for RNP 10 or RNP 4, as

d. Non-RNP 10 operators/aircraft may file any

route at any altitude in a GoMex CTA. They will be

cleared to operate on their preferred routes and

altitudes as traffic permits. 50 NM lateral separation

will not be applied to Non-RNP 10 aircraft.

e. Non-RNP 10 aircraft are encouraged to operate
at altitudes above those where traffic is most dense
(i.e., at/above FL 380), if possible. Non-RNP 10
aircraft should plan on completing their climb to or
descent from higher FLs within radar coverage, if

4-7-5. Operator Action

In order to maximize operational flexibility provided
by 50 NM lateral separation, operators capable of
meeting RNP 10 or RNP 4 that operate on oceanic
routes or areas in the GoMex CTA's should obtain
authorization for RNP 10 or RNP 4 and annotate the
ICAO flight plan accordingly.

1. RNP 10 is the minimum "Navigation Specification
(NavSpec)" required for the application of 50 NM lateral

separation. RNP 4 is an operator option. Operators/air-
craft authorized RNP 4 are not required to also obtain
RNP 10 authorization.

2. "RNP navigation specification" (e.g., RNP 10) is the
term adopted in the ICAO Performance-based Navigation
(PBN) Manual (Doc 9613). It replaces the term "RNP

4-7-6. RNP 10 or RNP 4 Authorization:
Policy and Procedures for Aircraft and

a. RNP NavSpecs Applicable To Oceanic Opera-
tions. In accordance with ICAO guidance, RNP 10
and RNP 4 are the only NavSpecs applicable to
oceanic and remote area operations. Other RNAV and
RNP NavSpecs are applicable to continental en route,
terminal area and approach operations.
b. FAA Documents. Advisory Circular (AC)
90-105, Approval Guidance for RNP Operations and
Barometric Vertical Navigation in the U.S. National

Airspace System and in Oceanic and Remote

Continental Airspace, provides operational approval
guidance for RNP 4 and 10. It identifies minimum
aircraft capabilities and operator procedural and
training requirements in order to qualify for RNP 4 or

10. AC 90-105 is consistent with the ICAO PBN

Manual discussed below. Pertinent FAA and ICAO

documents are posted online in the West Atlantic

Route System, Gulf of Mexico and Caribbean

Resource Guide for U.S. Operators described in
paragraph 4-7-1.

c. ICAO Performance-based Navigation (PBN)
Manual (ICAO Doc 9613). Guidance for authoriza-
tion of RNP 10 and RNP 4 is provided in ICAO Doc
9613. RNP 10 is addressed in Volume II, Part B;
Chapter 1. RNP 4 is addressed in Volume II, Part C;
Chapter 1.
d. RNP 10 and RNP 4 Job Aids. Operators and
authorities are encouraged to use the RNP 10 or RNP
4 Job Aids posted on the FAA Resource Guide for
U.S. Operators described in paragraph 4-7-1. For
U.S. operators, a set of RNP 10 and RNP 4 Job Aids
provides references to FAA documents. An RNP 4
Job Aid, references to the ICAO PBN Manual, is
also available on the ICAO European and North
Atlantic Office website. These Job Aids address the
operational and airworthiness elements of aircraft
and operator authorization and provide references to
appropriate document paragraphs. The Job Aids

provide a method for operators to develop and

authorities to track the operator/aircraft program
elements required for RNP 10 or RNP 4

e. Qualification of Aircraft Equipped With a
Single Long-Range Navigation System (S-LRNS)
For RNP 10 Operations In GoMex CTAs.

4-7-2 Operational Policy/Procedures for the Gulf of Mexico 50 NM Lateral Separation Initiative

Page 276 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

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