ENV01 — Continuous Descent Operations (CDO)
—
Notes:
(1) Since the publication of ICAO Doc 9931, the term Continuous Descent Operations (CDO) has generally replaced the term CDA (Continuous Descent Approach).
(2) In principle, it is not required to implement CDO on a 24/7 basis, but it should be facilitated to the extent possible, according to local conditions.
(3) As a reference guidance the expected date for deployment of Block 0 modules in the ICAO GANP, to which this objective is linked through ASBU B0-CDO is 2013-2019, and for Block 1, linked through B1-CDO, is from 2019-2025.
(4) At the time of publication of this document, the methodology released in 2016 by the CCO/CDO TF1 is currently being reviewed by the CCO/CDO TF2.
NOTE FOR MILITARY AUTHORITIES: It is the responsibility of each military authority to review this Objective IN ITS ENTIRETY and address each of the SLoAs that the military authority considers RELEVANT for itself. This has to be done on top and above of the review of "MIL" SLoAs which identify actions EXCLUSIVE to military authorities.
- Edition
- 2019
- Stakeholders
- Air Navigation Service Provider / Airport Operator / Airspace Users
- Type
- SESAR
- Scope
- Airport
- Status
- Active
Links to ATM Master Plan Level 2
Operational Improvment Steps
| Code | Title | IOC | FOC | Related Elements |
|---|---|---|---|---|
| AOM-0701 | Continuous Descent Approach (CDA) | — | — |
 |
| AOM-0702-A | Continuous Descent Operations (CDO) | 01-07-2017 | 01-07-2021 |
    |
Links to SESAR Solutions
| Code | Title | Program | Related Elements | Analysis |
|---|---|---|---|---|
| #11 | Continuous Descent Operations (CDO) | SESAR1 |
 |
Analysis |
Links to PCP ATM Sub-Functionalities ICAO Block Modules
References
- Applicable legislation
- Regulation (EU) 598/2014 of 16 April 2014 on the establishment of rules and procedures with regard to the introduction of noise-related operating restrictions at Union airports within a Balanced Approach and repealing Directive 2002/30/EC (as from 16/06/2016).
EC Directive 2002/49/EC, dated 25.06.2002 relating to the assessment and management of environmental noise.
EC Directive 2008/50/EC, dated 21.05.2008 on ambient air quality and cleaner air for Europe. - Applicable ICAO Annexes and other references
- ICAO Annex 16 - Volume I - Aircraft Noise
- Deployment Programme 2019
- —
- Operating Environments
- Airport
- Terminal Airspace
Expected Performance Benefits
- Safety
- -
- Capacity
- -
- Operational efficiency
- CDOs contribute to reducing airlines operating costs including a reduction in fuel consumption by the flying of optimised profiles (no vertical containment required). If the CDO is flown as part of a PBN procedure, the predictability of the vertical profile will be enhanced for ATC.
CDOs are also a proxy for Vertical Flight Efficiency (VFE) and should be monitored according to harmonised definitions and parameters in order to measure efficiency. - Cost efficiency
- -
- Environment
- Reduction of fuel burn (and consequently, atmospheric emissions) has been estimated to be 51kg per flight for those flying CDO over those flying non-CDO. In addition, studies have indicated that due to lower drag and thrust facilitated by CDO, over certain portions of the arrival profile, noise can be reduced by up to 5dB.
- Security
- -
| Code | Dates | |
|---|---|---|
|
1999
99
2000
00
2001
01
2002
02
2003
03
2004
04
2005
05
2006
06
2007
07
2008
08
2009
09
2010
10
2011
11
2012
12
2013
13
2014
14
2015
15
2016
16
2017
17
2018
18
2019
19
2020
20
2021
21
2022
22
2023
23
2024
24
2025
25
|
||
|
|
||
| ENV01 | 20070701_20231231 | |
| ASP01 |
84%
|
20070701_20231231 |
| ASP02 |
46%
|
20180101_20231231 |
| ASP03 |
84%
|
20070701_20231231 |
| ASP04 |
62%
|
20180323_20231231 |
| APO01 |
70%
|
20180101_20231231 |
| USE01 | 20070701_20231231 |
Supporting Material
| Title | Related SLoAs |
|---|---|
|
EUROCONTROL - CCO, CDO harmonised definitions, metrics and parameters |
APO01, ASP04 |
|
EUROCONTROL - EUROCONTROL CDO/CCO Supporting Material https://www.eurocontrol.int/concept/continuous-climb-and-descent-operations |
APO01, ASP01, ASP02, ASP04, USE01 |
|
EUROCONTROL - European Joint Industry CDA Action Plan https://www.eurocontrol.int/publication/european-joint-industry-cda-action-plan |
ASP01, ASP03, USE01 |
|
EUROCONTROL - IANS-ENV-INTRO - Introduction to Environment -e-learning training course 12/2012 |
ASP03, USE01 |
|
ICAO - Doc 4444 - Air Traffic Management - Edition 15 / 11/2010 |
ASP01, ASP02 |
|
ICAO - Doc 9426 - Air Traffic Services Planning Manual - Edition 1 / 12/1992 |
ASP01, ASP02 |
|
ICAO - Doc 9613 - Performance-based Navigation (PBN) Manual - Edition 4 / 03/2013 |
ASP01, ASP02 |
|
ICAO - Doc 9931 - Continuous Descent Operations (CDO) Manual - Edition 1 / 12/2010 |
ASP01, ASP02, ASP03, USE01 |
Consultation & Approval
- Working Arrangement in charge
- Airport Operations Team (AOT)
- Outline description approved in
- —
- Latest objective review at expert level
- 05/2018
- Commitment Decision Body
- Provisional Council (PC)
- Objective approved/endorsed in
- 07/2003
- Latest change to objective approved/endorsed in
- 07/2013