4/20/23 

AIM 

(4)  Advanced RNP (A

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RNP).

 Advanced RNP is a NavSpec with a minimum set of mandatory 

functions enabled in the aircraft’s avionics suite. In the U.S., these minimum functions include capability to 

calculate and perform RF turns, scalable RNP, and parallel offset flight path generation. Higher continuity (such 

as dual systems) may be required for certain oceanic and remote continental airspace. Other “advanced” options 

for use in the en route environment (such as fixed radius transitions and Time of Arrival Control) are optional 

in the U.S. Typically, an aircraft eligible for A

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RNP will also be eligible for operations comprising: RNP APCH, 

RNP/RNAV 1, RNP/RNAV 2, RNP 4, and RNP/RNAV 10. A

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RNP allows for scalable RNP lateral navigation 

values (either 1.0 or 0.3) in the terminal environment. Use of these reduced lateral accuracies will normally 

require use of the aircraft’s autopilot and/or flight director. See the latest AC 90

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105 for more information on 

A

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RNP, including NavSpec bundling options, eligibility determinations, and operations approvals. 

NOTE

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A

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RNP eligible aircraft are NOT automatically eligible for RNP AR APCH or RNP AR DP operations, as RNP AR eligibility 

requires a separate determination process and special FAA authorization. 

(5)  RNP 1.

 RNP 1 requires a lateral accuracy value of 1 for arrival and departure in the terminal area, 

and the initial and intermediate approach phase when used on conventional procedures with PBN segments (for 

example, an ILS with a PBN feeder, IAF, or missed approach). RF turn capability is optional in RNP 1 eligibility. 

This means that your aircraft may be eligible for RNP 1 operations, but you may not fly an RF turn unless RF 

turns are also specifically listed as a feature of your avionics suite. 

(6)  RNP 2.

 RNP 2 will apply to both domestic and oceanic/remote operations with a lateral accuracy 

value of 2. 

(7)  RNP 4.

 RNP 4 will apply to oceanic and remote operations only with a lateral accuracy value of 

4. RNP 4 eligibility will automatically confer RNP 10 eligibility. 

(8)  RNP 10.

 The RNP 10 NavSpec applies to certain oceanic and remote operations with a lateral 

accuracy of 10. In such airspace, the RNAV 10 NavSpec will be applied, so any aircraft eligible for RNP 10 will 

be deemed eligible for RNAV 10 operations. Further, any aircraft eligible for RNP 4 operations is automatically 

qualified for RNP 10/ RNAV 10 operations. (See also the latest AC 91

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70, Oceanic and Remote Continental 

Airspace Operations, for more information on oceanic RNP/RNAV operations.) 

(9)  RNP 0.3.

 The RNP 0.3 NavSpec requires a lateral accuracy value of 0.3 for all authorized phases 

of flight. RNP 0.3 is not authorized for oceanic, remote, or the final approach segment. Use of RNP 0.3 by 

slow

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flying fixed

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wing aircraft is under consideration, but the RNP 0.3 NavSpec initially will apply only to 

rotorcraft operations. RF turn capability is optional in RNP 0.3 eligibility. This means that your aircraft may be 

eligible for RNP 0.3 operations, but you may not fly an RF turn unless RF turns are also specifically listed as 

a feature of your avionics suite. 

NOTE

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On terminal procedures or en route charts, do not confuse a charted RNP value of 0.30, or any standard final approach 

course segment width of 0.30, with the NavSpec title “RNP 0.3.” Charted RNP values of 0.30 or below should contain two 

decimal places (for example, RNP 0.15, or 0.10, or 0.30) whereas the NavSpec title will only state “RNP 0.3.” 

(b)  Application of Standard Lateral Accuracy Values. 

U.S. standard lateral accuracy values typically 

used for various routes and procedures supporting RNAV operations may be based on use of a specific 

navigational system or sensor such as GPS, or on multi

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sensor RNAV systems having suitable performance. 

(c)  Depiction of PBN Requirements.

 In the U.S., PBN requirements like Lateral Accuracy Values or 

NavSpecs applicable to a procedure will be depicted on affected charts and procedures. In the U.S., a specific 

procedure’s Performance

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Based Navigation (PBN) requirements will be prominently displayed in separate, 

standardized notes boxes. For procedures with PBN elements, the “PBN box” will contain the procedure’s 

NavSpec(s); and, if required: specific sensors or infrastructure needed for the navigation solution, any additional 

or advanced functional requirements, the minimum RNP value, and any amplifying remarks. Items listed in this 

PBN box are REQUIRED to fly the procedure’s PBN elements. For example, an ILS with an RNAV missed 

approach would require a specific capability to fly the missed approach portion of the procedure. That required 

Performance

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Based Navigation (PBN) and Area Navigation (RNAV) 

1

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2

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