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Pat BensonGPS AIR INTEGRATIONS

Digital Aeronautical Data for Navy GPS Aircraft

Integrations

September 2004

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Navy Letter

• Serial PMW/A-156-7/023

• Title: Safety and Accuracy of NGA’s DAFIF Database– Digital Data Importance to Naval Navigation– NAVAIR Expectations of digital data

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Navigation

RNAV (Approaches,SIDS, STARS, Routes)

DigitalData

GPS as Primary Means

JPALS

RNP

Navigation CapabilitiesDependence

GPS Navigation is Dependant on Digital Data

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DAFIF Use Past

TAXI TAKEOFF

INITIALCLIMB

DEPARTURE

OCEANIC / EN ROUTE TERMINAL NON-PRECISIONAPPROACH

CAT I CAT II CAT III

0

100

200

PRECISION APPROACH & LANDING

VFR

5

DAFIF Use Future

TAXI TAKEOFF

INITIALCLIMB

DEPARTURE

OCEANIC / EN ROUTERNP - 4

TERMINALRNP - 1

NON-PRECISIONAPPROACH

RNP - 0.3

CAT I CAT II CAT III

0

100

200

PRECISION APPROACH & LANDING

MH-53E 2004

2006 - P-3, E-2C, F-18, EA-6B, etc…

2008-10F-18

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Navy DAFIF QualityRequirements

TAXI TAKEOFF

INITIALCLIMB

DEPARTURE

OCEANIC / EN ROUTERNP - 4

TERMINALRNP - 1

NON-PRECISIONAPPROACH

RNP - 0.3

CAT I CAT II CAT III

0

100

200

PRECISION APPROACH & LANDING

Essential Essential1X10-5 1X10-5

RNAV SIDS

RNAV GPSApproaches

Critical1X10-8

RNAV GPS Precision

Approaches

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NIMADigitizes and FormatsRNAV PROCEDURE

(Translated from Paper or re-typed)

TERP AGENCYRNAV

PROCEDURE CREATION

(Paper Only)

FAA FLIGHT RNAV Procedure

CHECK

(Fat Fingered data from Paper)

User

DAFIF CD-ROM or Web

0101001

Paper NGA Translation Process Introduces Errors

No NGA Feedback process from TERPs Agency

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What does NAVAIR Expect from NGA?

• Recognition of the Issue

• Lead the effort in establishing the new process

– FAA & DoD coordination

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Provide methods or tools for TERPing agencies to

review DAFIF

What does NAVAIR Expect from NGA?

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Implement automated format & logic checks on

procedures

Provide methods or tools for TERPing agencies to

review DAFIF

What does NAVAIR Expect from NGA?

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Implement automated format & logic checks on

procedures

Provide methods or tools for TERPing agencies to

review DAFIF

Provide TERPing agencies with input

data format

What does NAVAIR Expect from NGA?

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Proposed Solution

TERP AGENCYRNAV

PROCEDURE CREATION

NIMAFormats

RNAV PROCEDURE

FAA FLIGHT RNAV Procedure

CHECKDAFIF

CD-ROMUser

0101001

RNAV ProcedureFormat & Logic Check

0101001

TERP AGENCYRNAV

PROCEDURE REVIEW

0101001

0101001

Digital Transfer, Flight Check, Automated Checks, TERP review

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Summary

• Safety and Accuracy of NGA’s DAFIF Database– Digital Data Importance to Naval Navigation– NAVAIR Expectations of digital data

• Essential Data 1X10-5 – RNAV GPS Approaches & RNAV SIDS

• Critical Data 1X10-8– GPS Precision Approaches

Typo - should be4.0

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Digital Procedure ProcessToday

TERP AGENCYRNAV

PROCEDURE CREATION

(Paper Only)

FAA FLIGHT RNAV Procedure

CHECK

(Fat Fingered data from Paper)

NIMADigitizes and FormatsRNAV PROCEDURE

(Translated from Paper or re-typed)

User

DAFIF CD-ROM or Web

0101001

Paper NGA Translation Process Introduces Errors

No NGA Feedback process forTERPs Agency

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• Random Sample of 128 Approaches over 2 years FY02 & 03 – 27 bad approaches due to SOF errors– Errors confirmed by NAVFIG

• Analysis– Errors were translation errors from paper to

digital

Issue: SOF Errors in GPS Approach Procedures