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

SOCM-2 Seminar Data Link Benefits. Presented By: Dennis Addison, FAA Date: February 8, 2012. Satellite Data Link Benefits. Aircraft message exchange time is reduced. FAA HFRO clearances must be delivered within 3 minutes. Actual Communication Performance (ACP)

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

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  1. SOCM-2 Seminar Data Link Benefits Presented By: Dennis Addison, FAA Date: February 8, 2012

  2. Satellite Data Link Benefits • Aircraft message exchange time is reduced. • FAA HFRO clearances must be delivered within 3 minutes. • Actual Communication Performance (ACP) • Total time required by the communication transaction • Begins when the CPDLC uplink message is sent to aircraft • Ends when the WILCO is received

  3. Satellite Data Link Benefits • Data Link communications provides a direct link to the aircraft. • Third Party HF Radio relays are removed. • Safety is increased when messages are not repeated by a third party. • Errors can occur each time a message is verbally repeated.

  4. Satellite Data Link Benefits • More frequent and accurate position reports are received via ADS-C. • ADS-C contract rate can be increased in emergency situations. • Event contracts alert ATC when aircraft are deviating from their cleared profile.

  5. Satellite Data Link Benefits • CPDLC clearances use a clearly defined digital message set. • The standardized clearance message set reduces the chance of misinterpretation. • Readback/Hearback errors are removed. • Route clearances load directly into the FMS.

  6. Satellite Data Link Benefits • Oceanic Separation Standards are reduced. Lateral Separation 200 Miles 60 Miles Longitudinal Separation 10 Mins (~80 Miles) 30 Miles 30 Miles 30 Miles

  7. Satellite Data Link Benefits • Satellite Data Link Communications are more reliable than HF communications. • HF Communications Atmospheric Conditions. • Solar Flares • Multiple ATC Facilities use the same frequency

  8. Satellite Data Link Benefits • Satellite Data Link reduces HF congestion. • When traffic levels are high, aircraft may have to wait to transmit their messages. • FANS equipped aircraft do not compete for band width on the HF frequencies under normal conditions.

  9. Satellite Data Link Benefits • Satellite Data Link makes more advanced procedure possible. • Dynamic Airborne Reroute Procedure (DARP) • Allows Airborne Aircraft to obtain a new more efficient route. • Tailored Arrivals • This procedure uplinks an Optimized Profile Descent to the aircraft FMS. • ADS-C CDP • This procedure allows a controller to Climb/Descend another aircraft through the altitude of a blocking aircraft.

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