Design & application of cdo for ahmedabad airport within ahmedabad tma

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•AHMEDABAD AIRPORT
Design & Application of CDO for
Ahmedabad Airport within
Ahmedabad TMA Arvind Kumar Singh
Ahmedabad

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Personal Details
 Eighteen years of working experience as an ATCO and in airside & airport
operation
 Joined AAI in 1998
 Educational Qualification: B. Sc., MBA(HRM),GATE-98
 Professional Qualifications/Training: ATC Training, Instructor’s Training
Course, PANS-OPS, Airside/Airport Operations, Aviation Law & Annexes
 Awarded ‘Principal’s Cup’ in ADC/ APP & ACC
 Having all the procedural and surveillance rating of Ahmedabad
 OJTI for procedural and surveillance
Design & Application of CDO for Ahmedabad Airport within Ahmedabad TMA 2

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Airports Authority of India
 ANSP and major Airport Operator with 30 different
departments
 125 airports including 68 operational and 26 civil enclaves.
 Provides ANS at all Indian airports and 2.8 million square NM
of Indian airspace
 Training of ANS/airport personnel

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Design & Application of CDO for Ahmedabad Airport within Ahmedabad TMA
• Design of CDO procedure for RWY 23 at Ahmedabad airport
• Data and information of CDO procedure
• SOP/Instruction for flight crew and ATCOs
• Safety Assessment
• Implementation procedure
Objective & Purpose
4

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Out Line
 Introduction: aim & objectives of study
 Introduction of author
 Benefits, requirements contributing factors in Ahmedabad TMA
 Project Management
 Design & Applications and SOP
 Implementation & verification
 Conclusion, contribution of the study, limitations & direction for
future

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Continuous Descent Operation
Thrust
Entire Descent & Approach
•Least Possible Thrust
•Highest possible altitude
6

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CDO Design Option
 Open Path Design:
 Vectored CDO Procedure
 Open CDO Procedure to Down-wind
Unknown distance and DTG estimate by the Controller
 Closed Path Design: Known Distance
8

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Existing CDO Procedure
 Trial CDO from May-2013 by tactical vectoring
 Acceptance taken from aircraft
 Agreed aircraft cleared for CDO
 Provided DTG
 Record of fuel saving reported by aircraft
 NOTAM was taken for trial operation and periodically revised
 DTG information is not accurate and flight path may not fully
optimized

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Cost benefit, fuel efficiency & carbon emission analysis
Total no. of
arrival(A)
65% of A
(B)
Average Fuel
saving Per Flight
(C)
Per day Fuel
saving (D=BXC)
Annum fuel Saving
(E=DX365)
75 49 135 Kg 6615 Kg 2414475 Kg
2414 Tons
• Due to non availability of specific published procedure of CDO, limited aircraft
perform CDO
• Average no. of schedule aircraft movements per day: 150 (75 ARR & 75 DEP)
• After establishment of CDO procedure, 65% arrivals can perform CDO (Type of
acft A320 & B737 )
Fuel saving in terms of Rs/USD per
annum (F=EXRs. 49.287)
Fuel saving in terms Carbon Emission per annum
(G=Ex3.2)
Rs. 119 million
USD 17. 55 Lacs (@67.8)
7726320 Kg
7.72 MT
11

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Hypothesis and Constraints
Hypothesis/Assumptions
 ATS by surveillance in en-route and terminal
 Instrument approach procedures and ILS equipment
 Flyablity test by procedure designer
 Accommodate variety of aircraft
 Necessary approval from regulator by flight FPD section and ANSP
 Advance intimation by ANSP through AIP supplement.
Constraints
• Implementation depend upon approval from regulator
• Aircraft having RNAV 1 capability
• Surveillance required
• Procedure should support existing IAL procedures.

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Deliverables
CDO for Ahmedabad Airport
Project Plan
Risk
Management
Plan
Completion
Reports
Schedule
Plan
Budget Plan
Progress
Reports
Procedure of CDO for RWY 23
Certification
and approval
CDO RNAV 1
STAR Charts
Associated
SIDs Charts
Instructions
for flight
Crew
CDO
phraseology
Data base
Coding table
URDTRD
Publication
of Procedure
Quality Deliverables
Flyability test
Reports
Pilot's
Reports and
Review
Flight
Simulation
Training
Deliverables
Pilot Training
ATC Training
13

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Project Network Diagram
•Design & Application of CDO for Ahmedabad Airport within Ahmedabad TMA 14
Project Network Diagram
9
3
4
5
7
6
8
Start 1 2
10
0
11
12End of Project 13
Conceptual DesignStakeholder review
Design of CDO
procedure
Flyability Test
Stakeholder
review
Safety Assessment
Flight Simulator
Evaluation
ATC Training
Pilot Training
Operational Flight
Trial
Certification and
approval
Publication of
procedure
Post implementation
analysis

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Schedule & Cost Estimation of the Project
 Schedule of the Project: Eight and half months from
conceptual level to implementation.
 Cost Estimation
S. No. Deliverables Cost in Lacs (INR)
1. Design of CDO procedure &
Flyability Test
(Ground Simulation)
6.00
2. Training (ATC) .50
3. Miscellaneous .50
Total (In INR) 7.00 Lacs
15

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CDO Procedure for RWY 23
• Closed STARs are the best solution for CDO in view of medium
density of traffic
• Constructed in accordance to ICAO Document 9931 & 8168
• Designed by the TARGETS & passed the flyability test of TARGETS
• Charts are prepared accordingly.
• Compatible with proposed RNP procedure
• Altitude at way points is at or above to facilitate different type of
aircraft.
• Coding table with Distance to Go information.
• CDO can be requested by pilot or initiated by ATC.
16

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CDO RNAV-1 Standard Instrument Arrivals
S. No. ATS Route Transition RNAV STAR
1. W13,Q3 UUD
HAKEM
2 Q4 ADBUK
3 W13N APANO
PLOMA
4 W97 QQZ
5 N895, W40,G472 BODAR TASHU
6 N893,G472 VASLA LAJER
7 W62 RKT
LUPKA
8 W135 LADUP
RNAV Holding Procedures
Holding
Waypoint
Latitude and
Longitude of
Holding
Waypoint
Inbound
course
Deg. Mag.
Outbound
Leg
(Min)
Turn
Minimum
Holding
Altitude
(Ft.)
Maximum
Holding
Altitude
(Ft.)
HAKEM
N23° 29' 12.67"
E073° 04' 28.88"
225 1 Left F090 -
PLOMA
N22° 45' 24.29"
E072° 55' 25.87"
358 1 Right F080 -
17

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PLOMA & TASHU RNAV-1 Arrival RWY 23

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Coding Table of PLOMA RNAV-1 Arrival RWY 23
Leg No. Leg Type Way
Point
Name
Flyover Magnetic
Course
True
Course
Distance Altitude Speed Turn
Direction
Navigation
performance
DTG
Formal Description ( Transition APANO)
10 IF APANO - 0 F250+ RNAV-1 110.2
20 TF PLOMA - 357.59 357.34 70.2 F080+ K250-
RNAV-1
40
Formal Description( Transition QQZ)
10 IF QQZ - F150+ RNAV-1 70.37
20 TF PLOMA - 326.88 326.63 30.37 F080+ K250-
RNAV-1
40
10 IF PLOMA - 0 F080+ K250-
RNAV-1
40
20 TF AH677 - 351.99 351.74 9.2 RNAV-1 30.8
30 TF AH611 - 351.97 351.72 5 RNAV-1 25.8
40 TF IDNEP - 351.42 351.17 8.9 3000+ K210- RNAV-1 16.9
50 TF NIXUM - 314.97 314.72 6.37 2000+ L RNAV-1 10.53
60 TF AH809 - 224.98 224.73 5
2000
K180- L RNAV-1 5.53
70 TF RWY 23 - 224.98 224.73 5.53
430 RNAV-1

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HAKEM RNAV-1 Arrival RWY23

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LAJER & LUPKA RNAV-1 Arrival RWY 23

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Departures (Associated SIDs)
S. No. ATS Route Transition RNAV SID
1 W13N, Q3 UUD FAROG
2 G451, N895 SASRO
NEWAL
3 W62 RKT
4 W13S BVR
5 W97 QQZ
6
W40, N895,
G472
BODAR
7 W135 LADUP
CDO RNAV STARs, SIDs of runway 23 has been revised to facilitate departure
22

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NEWAL RNAV Departure RWY 23

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FAROG RNAV-1 Departure RWY 23

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SOP/Instructions for Flight Crew & ATCOs
 Conditions for Conducting CDO: Availability of runway, ILS and AOM
 Requirements for flights: like equipments
 Preparations for CDO: Flights meets the requirement
 CDO Execution: Phraseology
 Deviation from lateral or vertical path: For sequencing or to
accommodate departures
 Termination of a CDO: CDO can be terminated on the basis of traffic
 Safety Assessment
 Size of change : Small
 Safety outcome of change : Minimal
 Overall Safety Magnitude of the Change: Minor

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Implementation
 By the collaborative effort of all stakeholders
 Commitment from Management
 Planning
 Conceptual design and risk assessment with all stakeholders and
their readiness
 Implementation
 Desktop/ground flyability test
 Training of ATCOs & flight crew
 Submission to regulator for approval
 Intimation through AIP Supplement.

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Verification
 STARs and SIDs passed flyability assessment for heavy, large and small jets as
 Leg length to complete turn, Speed constraints, Altitude constraints
 Ability to join outbound leg after completion of flyby turn
 Ability to fly over a waypoint on the correct heading
 Desktop simulation by TARGETS and found satisfactory.
 Charts submitted to Indigo airline for flight simulation to check the advantages of
CDO

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Contribution of the Study
 CDO RNAV STARs are from all existing routes for Ahmedabad
 Roadmap for implementation of CDO at Indian airports
 Similar procedure can be implemented at medium density airport
 STARs are in line with existing IAL procedure
 Closed STAR will reduce workload of flight crew and ATCOs
 Provide more accurate information
 Milestone from trial CDO to implementation of CDO in India

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 Proposed CDO RNAV STARs have less distance to touch down
as compare to existing STARSs
S. No. ATS Route Existing STAR
DTG from
Existing STAR
DTG from
Proposed STAR
Transition
Proposed
RNAV STAR
1. W13,Q3 UUD 1 A 115NM 114.58 NM UUD
HAKEM
2 Q4 - 153.79 NM ADBUK
3 W13N APANO 1A 133.91 110.2 NM APANO
PLOMA
4 W97 QQZ 1 A 102.81 70.37 NM QQZ
5
N895,
W40,G472
BODAR 1A 100.77 98.69 NM BODAR TASHU
6 N893,G472 VASLA1 A 126.13 111.59 NM VASLA LAJER
7 W62 RKT1 A 144.51 140.98 NM RKT
LUPKA
8 W135 - - 125.80 NM LADUP
Contribution of the study
29

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Direction for Future
 Study on a larger scale may include Indian airports, to set a
benchmark for implementation of CDO
 Similar procedure can be developed & implemented for runway
05 of Ahmedabad & other Indian airport
 Enrich the ANSPs, airlines operator and other stakeholders for
understanding and benefits of CDO
 Step towards 4D trajectory to achieve the goal of global aviation
community

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Summary
 Lack of any published procedure, most of the time CDO is not carried out
 ATCO hesitate to give CDO, anticipating the future traffic scenario
 Well established CDO procedure rendered benefits to airlines and ANSP
 CDO RNAV STARs & associated SIDs and procedure is guideline for ATCOs and
pilots for execution
 Less fuel consumption have direct positive impact on operational cost &
contribution for sustainable aviation
 Availability of published procedure will encourage pilots for execution of CDO
 Implementation of such procedure is essential for Ahmedabad and other
airports as per requirement of time and in line with ASBU

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