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AOP12 — Improve Runway and Airfield Safety with Conflicting ATC Clearances (CATC) Detection and Conformance Monitoring Alerts for Controllers (CMAC)

Detection and alerting of conflicting ATC clearances (CATC) to mobiles (aircraft and vehicles) and non-conformance to procedures and clearances (CMAC) for traffic on the movement area. These functionalities will improve runway and airfield safety by providing early detection of hazardous situations that may potentially put the vehicles and aircraft at risk of collision.

CMAC and CATC shall be performed by the ATC system based on 'A-SMGCS Surveillance' (former A-SMGCS Level 1), the clearances, given to mobiles by the controller and known constraints such as the assigned runway, holding point, the route of the mobile and the aircraft type.

The controller shall input all clearances given to aircraft or vehicles into the ATC system using an Electronic Clearance Input (ECI) means such as the Electronic Flight Strip (EFS).

Different types of CATC shall be identified (for example Line-Up vs. Take-Off). Some may only be based on the controller input; others may in addition use other data such as 'A-SMGCS Surveillance' data.

CMAC shall alert controllers when aircraft and vehicles deviate from ATC instructions, procedures. The detection of Conflicting ATC Clearances shall aim to provide an early prediction of situations that if not corrected would end up in hazardous situations that would be detected in turn by the Runway Monitoring and Conflict Alerting (RMCA) if in operation.

RMCA (former A-SMGCS Level 2), CATC and CMAC are the three functionalities of the 'A-SMGCS Airport Safety Support' service.

RMCA (covered by Implementation Objective AOP04.2) is seen as a pre-requisite for the deployment of the complete A-SMGCS 'Airport Safety Support' Service.

Note: Safety nets have been defined for and through regulation/specifications for other environments and RWY environment partly. If the term 'Airport safety net' is not consistent with those definitions, it will however be used in this objective for consistency with PCP terminology. Actually, this objective is affecting the safety nets and controller support tools envelopes. RMCA is a RWY safety net and provides alerts on hazardous situations on the RWY regardless of whether the a/c have been cleared or not by ATC, which fits perfectly on the safety nets umbrella.

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.

Air Navigation Service Provider / Airport Operator / Airspace Users


Applicability Area(s) and Timescales

Applicability Area (PCP Airports):
See list of airports in MP Level 3 Implementation Plan - Annexes
(As in PCP Regulation for S-AF2.5)
Timescales From By Applicable to
Initial operational capability 01-01-2015 Applicability Area (PCP Airports)
Full operational capability 01-01-2021 Applicability Area (PCP Airports)

Links to PCP ATM Sub-Functionalities


Applicable legislation
Regulation (EU) No 716/2014 on the establishment of the Pilot Common Project
Applicable ICAO Annexes and other references
Deployment Programme 2022
Operating Environments

Expected Performance Benefits

Improved runway and airfield safety by providing early detection of hazardous situations that may potentially put the vehicles and aircraft at risk of collision. Improved situational awareness of all actors.
Operational efficiency
Cost efficiency
  Code Title From By Related Enablers
ASP01 Install required 'Airport Safety Nets'
  • 01-01-2015
  • 01-01-2021
ASP02 Train aerodrome control staff on the functionality of 'Airport Safety Nets'
  • 01-01-2015
  • 01-01-2021
ASP03 Implement digital systems such as electronic flight strips (EFS)
  • 01-01-2015
  • 01-01-2021
APO01 Train all relevant staff on the functionality of 'Airport Safety Nets'
  • 01-01-2015
  • 01-01-2021
USE01 Train Pilots on the functionality of 'Airport Safety Nets'
  • 01-01-2015
  • 01-01-2021
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

Supporting Material

Title Related SLoAs

EUROCONTROL - Integrated Tower Working Position (ITWP) Baseline HMI Description - V1.0 / 10/2020


EUROCONTROL - SPEC-171 - EUROCONTROL Specification for Advanced-Surface Movement Guidance and Control System (A-SMGCS) Services - Edition 2.0 / 04/2020

APO01, ASP01, ASP02

SJU - SESAR Solution 02: Data Pack for airport safety nets for controllers

APO01, ASP01, ASP02, USE01

Consultation & Approval

Working Arrangement in charge
Airport Operations Team (AOT)
Outline description approved in
Latest objective review at expert level
Commitment Decision Body
Provisional Council (PC)
Objective approved/endorsed in
Latest change to objective approved/endorsed in