RC1209_016-19_Feature 12/31/09 9:41 AM Page 18
FEATURE
• Reduce fuel burn with more continu- • Reduce miles flown in TRACON
ous vertical descents airspace
• Reduce miles flown in Terminal • Increase predictability of operations
Radar Approach Control (TRACON)
airspace
Atlanta (ATL) RNAV Departures
• Reduce interaction between depen- Atlanta RNAV SIDs have achieved
dent flows in multiplex airspace fuel savings due to reduced departure de-
lays of more than 2.5 minutes per flight.
Phoenix (PHX) RNAV Arrivals
Annual fuel savings are estimated at $34
Since the implementation of two million, with cumulative savings of $105
RNAV STARs at PHX in October 2006, million from 2006 through 2008.
significant benefits have been noted: 38
percent reduction in the time aircraft re-
Dallas-Fort Worth (DFW) RNAV
main in level flight; user benefit savings
Departures
estimated at $2 million annually; and re- DFW departures on initially diverging
ductions in carbon dioxide emissions esti- routes (fanned departures) have resulted in
mated at 2500 metric tons annually. improved separation efficiency and in-
Similarly, RNAV Standard Instrument creased capacity by 11 to 20 operations per
Departures (SIDs) can: hour, with cumulative savings estimated
• Reduce departure delay via diverging of $30 million from 2005 through 2008.
departure routes off the runway
• Reduce interaction between depen-
San Diego (SAN) RNAV
dent flows
Departures
• Reduce controller/aircraft communi- An RNAV SID at San Diego is pro- of 4.5 gallons and 95 pounds of carbon
cations jected to yield fuel and emissions savings dioxide per flight, which equates to re-
duction of nearly 1800 metric tons of
emissions annually.
RNP SAAAR
RNP SAAAR approach procedures of-
fer design flexibility and enhanced perfor-
mance, allowing us to mitigate obstacles
and de-conflict traffic as illustrated in the
RNP SAAAR approach at Dekalb-
Peachtree Airport (PDK) depicted below.
RNP Containment Provides
Separation From Obstacles
Similarly, Ronald Reagan Washington
National Airport’s RNP SAAAR ap-
proach to Runway 19 was designed to
avoid the protected areas near the nation’s
Capital and provide approved carriers
with the ability to land in situations of de-
creasing visibility due to weather.
NextGen In Motion:
Optimized Profile Descent (OPD)
As a component of its Trajectory-Based
Operations (TBO) NextGen initiative, the
FAA has authorized development of ar-
rival procedures with vertical profiles op-
timized to facilitate a continuous descent
from the top of descent to touchdown.
OPD flight procedures use the capabili-
ties of the aircraft Flight Management
System to fly a continuous, descending
path without level segments, based on the
18 ROTORCRAFT PROFESSIONAL • Heli-Expo 2010 Preview Issue
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