Navigation Reference System N R S

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Navigation Reference SystemN R S
National Airspace Redesign High Altitude Redesign
Briefing April 2005
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Navigation Reference System

• Initial Implementation
• June 10, 2004
• ZAU, ZKC, ZMP, ZDV, ZLC, ZOA, ZSE
• National Implementation
• May 12, 2005
• Remaining Centers (48 contiguous states)
• Non-Oceanic and Domestic Airspace Only
• Anchorage Center TBD

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Navigation Reference System

• NRS Waypoints may be used
• As part of a filed flight plan
• For route changes requested by flight crews
• Tactically by controllers

NRS Waypoints are currently not intended to be
included as part of TMU initiated routes.
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Navigation Reference System

• Expect a more immediate use by GA and corporate
  aircraft, with a gradual increase of usage by
  Airlines.
• Aircraft database memory limitations will
  restrict user ability to fly the NRS.

Some aircraft have less that 128K of onboard
memory !!!!
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Navigation Reference System

• Customers seek to file flight plans based on
  their own operational priorities.
• To the maximum extent possible, these aircraft
  should be left on the filed route.
• Filing via NRS and/or NRR (the Non-Restrictive
  Routing portion of High Altitude Redesign) gives
  users freedom to develop a flight path that meets
  all goals.

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Navigation Reference System

• Aircraft capable of using the NRS should include
  HAR or PTP in remarks.
• HAR indicates ability to use all of the NRS.
• PTP indicates Limited or No NRS capability.

Controllers should be aware this is not a
mandatory filing standard. System Users have been
asked for voluntary compliance. It is possible
controllers may find conflicting
information. Issues? Notify your NAR FLT so the
HAR office can address the problem.
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What Is the Designator to Identify Which Aircraft
Are Participating in HAR?

• HAR in field 11 of the flight plan identifies
  aircraft that have the capability of
  participating in these functionalities of HAR
• NRS Waypoint
• Waypoints around SUAs and ATCAAs
• Pitch / Catch points (Non-Restrictive Routing)

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What Is the Designator to Identify Which Aircraft
Are Participating in HAR?

• PTP in field 11 of the flight plan identifies
  aircraft that have the capability of
  participating in LIMITED functions of HAR
• Limited or No NRS Waypoints
• Possible Limitations on
• Waypoints around SUAs and ATCAAs
• Pitch / Catch points (Non-Restrictive Routing)

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Fly By vs Fly Over Waypoints

• All Enroute NRS waypoints are FLY BY unless being
  used for
• holding aircraft
• associated with a published SID or STAR
• All controllers should be aware of possible early
  turn or late turn characteristics associated with
  high altitude turns.

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NRS Naming Convention
K D 5 4 U
KD54U
ICAO Designator (US)
KILO DELTAFIVE FOURUNIFORM
KILO DELTAFIFTY-FOURUNIFORM
Center Designator
or
Latitude Identifier
Longitude Identifier
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ARTCC Designator
ZSE - S ZMP - P ZBW - B ZOA - O ZAU - G ZNY -
N ZLA - L ZOB - C ZDC - W ZLC - U ZKC - K ZID
I ZDV - D ZME - M ZTL - T ZAB - A ZFW -
F ZJX J ZHU H ZMA - R
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Navigation Reference System
K D 54 U
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NRS Questions

• At What Altitude Can NRS Be Used?

NRS waypoints may be used throughout the airspace
corresponding to the chart for which they are
depicted.
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NRS Questions
How Do I Know If An Aircraft Who Files PTP Can
Fly NRS?
Controllers must ask the flight crew.
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NRS Questions

• How Can I Use The NRS?

• The NRS has many uses. Some examples are
• Weather Avoidance
• Create Impromptu Parallel Routes
• Routes Around Busy Sectors

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NRS Questions

• How will an NRS point be displayed on the DSR?

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Discussion
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www.ato.faa.gov