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					Operational Perspective of
SFO OTA Trials




 Presented By:      FAA
                    Northern California TRACON
                    and Oakland ARTCC

          Date:     March 21, 2007


 OTA Symposium, March 20-22, 2007                Federal Aviation   1
                                                 Administration
Overview
• OTA procedures development process

• OTA trial procedure

• ADS contract management and CPDLC OTA
  clearance

• OTA trial period

• Operational perspective of OTA trials
  – Oceanic/En Route
  – Terminal
OTA Symposium, March 20-22, 2007          Federal Aviation   2
                                          Administration
SFO OTA Development Process

• Procedures, phraseology, support material were
  developed cooperatively

• Initial simulation walkthrough assessment conducted

• Profile and procedures revised
   – Pilot/controller interviews/questionnaires
   – Facility observations
   – Nightly reports


OTA Symposium, March 20-22, 2007            Federal Aviation   3
                                            Administration
Flight Crew Procedures
 •     OTA Request.
       – At least 60 minutes before the aircraft’s top of
         descent or
       – 2 hours prior to arrival, the flight crew will notify the
         controller by sending


 •     ”RQST SFO TRIAL”




OTA Symposium, March 20-22, 2007                     Federal Aviation   4
                                                     Administration
            Oceanic Controller Actions

                                   0200




                                   Modify
                                   Periodic
                                   255    1
                                   Contract




OTA Symposium, March 20-22, 2007              Federal Aviation   5
                                              Administration
              OTA Route 83 Clearance


                          KSFO



                         28R



                      ILS28R MENLO
 (83)     AT COSTS CLEARED ROUTE
 (19)     MAINTAIN F330




COSTS CREAN CINNY
BRINY/N0240A110 OSI/A070A
MENLO/N0200A045A




OTA Symposium, March 20-22, 2007     Federal Aviation   6
                                     Administration
OTA En Route Radar Procedures
•     Do not shortcut the aircraft’s route.

•     After radar identifying the aircraft, and considering
      traffic/airspace, provide pilot’s discretion descent
      clearance to 8000’ as soon as practical:

      – ”UAL76 descend at pilot’s discretion maintain
        8000 feet. Report leaving [current flight level]”

•     At any time the Tailored Arrival may be terminated
      by the Flight Crew or ATC.


OTA Symposium, March 20-22, 2007                Federal Aviation   7
                                                Administration
 Initial Trial Period
   • August 17, 2006. until September 5, 2006

   • Dec 15, 2006 and January 9, 2007

   • 40 OTA opportunities
      – 35 attempts
      – 35 successful uplinks
      – 27 successful wind uplinks
      – 26 successful thru Oceanic/En Route airspace
      – 20 successful thru Terminal airspace


OTA Symposium, March 20-22, 2007          Federal Aviation   8
                                          Administration
    Operational Assessment
Oceanic/En Route Prospective
•   Operational
    – No major problems encountered due to low traffic levels

    – Still some competition for airspace
      • Resolved via direct routings, vectors and speed control

    – Phraseology acceptable for test, but may not be for
      operational use
      • mismatch between uplink altitude restriction and verbal
        descent clearance to 8000



    OTA Symposium, March 20-22, 2007          Federal Aviation   9
                                              Administration
Operational Assessment
Oceanic/En Route Prospective

•     Automation
      – OTA clearance is manually constructed
      – ADS connection managed manually (required for
        data collection)
      – Lack of domestic data-link




OTA Symposium, March 20-22, 2007          Federal Aviation   10
                                          Administration
Operational Assessment
Oceanic/Enroute Transition Conclusions

•     Significant operational concerns if conducted during
      busier periods
      – Competition for airspace
      – Controller workload

•     Would require additional modelling/simulation




OTA Symposium, March 20-22, 2007                  Federal Aviation   11
                                                  Administration
 Operational Assessment

Northern California TRACON Perspective




 OTA Symposium, March 20-22, 2007   Federal Aviation   12
                                    Administration
All SFO Arrivals for January 5, 2007




OTA Symposium, March 20-22, 2007   Federal Aviation   13
                                   Administration
Operational Assessment
         Able to accommodate arrival due to low traffic levels




OTA Symposium, March 20-22, 2007                   Federal Aviation   14
                                                   Administration
Operational Assessment
    Lateral profiles of all oceanic arrivals during 24-hour period
                                   UAL 76 – Dark Track




OTA Symposium, March 20-22, 2007                         Federal Aviation   15
                                                         Administration
Operational Assessment
    Vertical profiles of all oceanic arrivals during 24-hour period
                                   UAL 76 – White Track




                                                          OSI




OTA Symposium, March 20-22, 2007                                Federal Aviation   16
                                                                Administration
Operational Assessment
                      Common profile during busy period
                HAL12 vectored south of OSI – Note speed




OTA Symposium, March 20-22, 2007                     Federal Aviation   17
                                                     Administration
Operational Assessment
                      Common profile during busy period
          HAL12 speed further reduced to pair with AAL1688




OTA Symposium, March 20-22, 2007                     Federal Aviation   18
                                                     Administration
Operational Assessment
                      Common profile during busy period
                           HAL12 well off of OTA profile




OTA Symposium, March 20-22, 2007                           Federal Aviation   19
                                                           Administration
Operational Assessment
                      Common profile during busy period




OTA Symposium, March 20-22, 2007                     Federal Aviation   20
                                                     Administration
    Operational Assessment
Terminal Perspective
•    Confusion among pilots over difference between clearance altitude
     and profile altitude (8000 vs. 7000)
•    Confusion among pilots reference current noise procedures (again,
     8000 is standard over OSI, profile used 7000)
•    Using 7000 at OSI may have generated unnecessary noise over noise
     sensitive communities
•    Procedurally, OTA is not currently an official mechanism – procedure
     is not a STAR and not an SIAP
•    Air Traffic rules require standard or special IAP clearance
•    OTA trials were successful as long as the test aircraft was first with no
     competition for airspace

    OTA Symposium, March 20-22, 2007                       Federal Aviation      21
                                                           Administration
OTA Symposium, March 20-22, 2007   Federal Aviation   22
                                   Administration
Back up Slides




OTA Symposium, March 20-22, 2007   Federal Aviation   23
                                   Administration
OTA/EDA Coordination
   • Oakland Center will receive a call in the evening from
     the aircraft dispatcher to identify the aircraft
     participants for the night.
   • The Oceanic Supervisor/CIC must coordinate the
     flight(s) with the NCT OMIC and obtain consensus to
     run the trial.
   • The Oceanic Supervisor/CIC must coordinate the
     flight(s) with OC4 and S35




OTA Symposium, March 20-22, 2007             Federal Aviation   24
                                             Administration
Scratch Pad Entry
   The Oceanic Supervisor must check to make sure the
      Scratch Pad page with the aircraft profiles is
      available for controllers to cut and paste from.

   Specific Details are contained in Operations Bulletin
      2006/071




OTA Symposium, March 20-22, 2007              Federal Aviation   25
                                              Administration
Enroute Descent Advisor (EDA) Clearance
 a. A second EDA-lite speed clearance may also be sent to flights
      that were identified during the nightly coordination.
 b. Send after the OTA routing clearance.
 c. If traffic permits, select the appropriate speed uplink message
      (ul106, ul111, or ul113) to assign a cruise mach.
 d. Append a descent mach/speed combination via free text, for
      example:
      um106/um111/um113 “MAINTAIN [ .xx]
      um169 freetext DES SPD .xx/yyy”
 e. The flight crew will review the speeds and, if acceptable, reply
      “WILCO”.
 NOTE: The speed schedule is not a speed restriction to be used for
       separation. Air speeds can vary (e.g. +/-15 knots) as the a/c tries to
       maintain the optimum vertical profile. If a speed restriction is
       necessary to maintain separation, do not use this option.

 OTA Symposium, March 20-22, 2007                             Federal Aviation   26
                                                              Administration
OTA Oceanic Procedures Cont.
•     Advise the Sector 35 controller that the flight is a
      “Tailored Arrival” as soon as possible.
•     After the termination of the ADS contract (around CINNY
      or ALCOA) manually re-establish the ADS contract as
      follows.
           a. Open the AFN Window, select the aircraft.
           b. Select “Initiate Connection”
           c. Select ADS
           d. Ensure the Periodic Reporting Rate is set to 0200
              minutes



OTA Symposium, March 20-22, 2007                  Federal Aviation   27
                                                  Administration

				
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