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Presented By: Dennis Addison, FAA Date: February 8, 2012

SOCM-2 Seminar GOLD Controller Procedures. Presented By: Dennis Addison, FAA Date: February 8, 2012. GOLD Controller Procedures.

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Presented By: Dennis Addison, FAA Date: February 8, 2012

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  1. SOCM-2 Seminar GOLD Controller Procedures Presented By: Dennis Addison, FAA Date: February 8, 2012

  2. GOLD Controller Procedures • The GOLD guidance material “is intended to maximize operational benefits in data link operations by promoting seamless and interoperable data link operations throughout the world.”

  3. GOLD Controller Procedures • Procedures for the use of Data Link are covered in the GOLD and other ICAO Docs. • The procedures for data link operations are very detailed and very developed over years of operational experience. • There is not time to cover all of the procedures in this briefing. • ANSPs and Operators utilizing data link should operate via the ICAO procedures.

  4. Controller Procedures • ICAO CPDLC Message Set, Doc 4444 Appendix 5 • GOLD 4.2.1.5: The controller should generally use standard message elements and should only use standard message elements when issuing a clearance. • GOLD 4.2.2.2: The controller should only use a free text message when an appropriate standard message element does not exist and the intended use does not change the volume of protected airspace (i.e., not a clearance). Refer to paragraph 4.2.1.5 for issuing clearances.

  5. Controller Procedures • ICAO CPDLC Message Set and Responses

  6. Controller Procedures Clearance messages require a WILCO/UNABLE Response • Many Uplink/Downlink messages require a response. Clearance requests require a Response • Failure to respond with a proper message will result in an Open Uplink or Downlink message.

  7. Controller Procedures • It is very difficult to intervene on transmitted CPDLC message. • Subsequent CPDLC messages may not be read before the initial clearance is acted on. • Carefully ensure clearances are valid before issuing them. • Voice may be used to intervene on a previously issued clearance. • DISREGARD CPDLC (message type) MESSAGE BREAK (correct Clearance)

  8. Controller Procedures • Conditional Vertical Clearances • GOLD 4.2.3.1: • The controller should precede conditional vertical clearances containing the word “AT” with UM 19 MAINTAIN [level] indicating to the flight crew to maintain their present level/altitude until the condition of the clearance is satisfied:

  9. Controller Procedures • Use caution with Cruise Climbs/Descents. • With a Cruise Climb/Descent an aircraft may climb or descend within their assigned altitudes until they report leaving an altitude. • With ADS-C altitudes are reported to ATC which may incorrectly indicate that another altitude may be assigned to an aircraft.

  10. Controller Procedures • Weather Deviations • Append Weather Deviation Clearances with a report back on route. • This will arm the FMS to send a back on route when the deviation is completed. • Use caution when clearing an aircraft on a deviation direct to a point. • Possible Back on Route sent. • Ensure the protected profile is correct.

  11. Controller Procedures • ADS-C Emergency Messages • Aircrews can accidently activate ADS-C emergency messages. • UM 169 CONFIRM ADS-C EMERGENCY • If the aircrew responds DM 3 ROGER DM67 ADS-C RESET, most systems will continue the flash emergency until a normal ADS-C message is received. • The ADS-C demand report is very helpful in this case.

  12. Controller Procedures • Relaying messages through a CPDLC aircraft. (GOLD 4.7.6) • Do not use Clearance Message elements in a relay through a CPDLC Aircraft to avoid arming their FMS with a clearance for another aircraft. • UM 169ap RELAY TO [call sign] [facilityname] [text of message to be relayed]

  13. Controller Procedures • Data Link Network Failures. • There are different links of the network that can fail with differing impacts • 4 Major DSPs • MTSAT • SITA • ARINC • IRIDIUM • INMARSAT

  14. Controller Procedures • Data Link Network Failures. • Ensure a backup means to contact aircraft exists. • Discontinuing ADS-C distance based separation standards. • Have an plan in place to manage data link network failures. • Increased RO workload.

  15. GOLD Controller Procedures • ADS-C Monitoring for aircraft conformance. • Lateral Event Contracts • Level Range Event Contracts • Waypoint Event Contracts • Periodic Contracts • ADS-C reported positions are Lat/Longs • Can makes it difficult to reconcile Out of Conformance (OOC) Position reports. • OOC position reports must be reconciled.

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