Avionics News March 2018 - 4

Study shows significant benefits of
CPDLC-DCL during inclement weather
thunderstorms, heavy precipitation and wind shear. This
resulted in a four-hour severe weather avoidance plan event,
with changing weather conditions requiring new routes for
aircraft awaiting departure.
CPDLC-DCL operational aircraft received revisions to
he Federal Aviation Administration has implementload, Wilco, and verified their clearance with the dispatch
ed Controller-Pilot Data Link Communicationsfaster and more efficiently. On average, these aircraft
Departure Clearance service, or CPDLC-DCL, at a large
received over 21 minutes less of a departure delay than
number of busy airports. CPDLC-DCL allows Air Traffic
non-CPDLC-DCL aircraft. To an aircraft operator, this
Control to send departure clearances through digital comcould be a significant savings over the course of a year with
munications rather than voice communications.
an aircraft that has a $2,000 to $3,000 per hour
The operator can accept the clearance and insert
operating cost, let alone the value of the passenit into the flight management system with little
gers' time.
to no ambiguity of what has been communicated
This was just one weather event. An operator
to the flight crew. This digital communications
will see savings every day when operating out of
procedure is much more efficient and accurate
busy airports. You don't have to wait in line to
than traditional voice clearance read-backs.
receive your voice clearance. With CPDLC-DCL,
you just log on and you have your clearance
Case Study: Baltimore/Washington
Robert Randall
within seconds, then call ground to taxi.
International Thurgood Marshall Airport

Editor's note: This article was first published by "UA Blog"
on the Universal Avionics Systems Corp. website, and the
company's source for data was Harris Corporation.

T

Located 9 miles south of downtown Baltimore is the
Baltimore/Washington International Thurgood Marshall
Airport. Out of the three major airports serving the
Baltimore/Washington metropolitan area, BWI is the busiest
(by passenger count), serving over 25 million passengers
per year. According to the airport's website, total daily
arrivals and departures average as follows:
*	 Scheduled domestic passenger flights: 634
*	 Charter passenger flights: 2
*	 International nonstop flights: 24
*	 Cargo flights: 10
In August 2016, BWI became CPDLC-DCL
operational during the FAA's Phase 1 of its tower service
implementation.
Study Results: Significant Time Savings
Just a few days after becoming CPDLC-DCL
operational, BWI experienced severe weather with

4

avionics news

*

march

2018

Additional Information
To equip for CPDLC-DCL, you'll need a
Communications Management Unit and Satellite-Based
Augmentation System-enabled Flight Management System
such as the Universal Avionics UniLink UL-800/801 and
SBAS-FMS.
To learn more how CPDLC-DCL can benefit your operations, download the free white paper available from the
Universal Avionics website. q

ROBERT RANDALL
Senior sales manager for the U.S.,
Universal Avionics Systems. Corp.
Tucson, Arizona



Table of Contents for the Digital Edition of Avionics News March 2018

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