Aerodrome CNS Safeguarding

Contact Training Department

Jenny Bradley
Jenny BradleyHead of Training
+49 30

Aerodrome “CNS Safeguarding” or “Technical Safeguarding” ensures that buildings do not interfere with the performance of Communication, Navigation and Surveillance (CNS) systems, such as primary or secondary radars, conventional radio navigation aids, radio transmitter/receiver antennas, etc.

These systems are very vulnerable to adverse effects caused by physical obstacles such as buildings, cranes, wind turbines as well as mobile objects (aircraft, construction equipment). Therefore, to ensure safe air operations, national and international aviation regulations define protection surfaces and approval procedures for new developments and constructions (e.g. ICAO EUR DOC 015 – managing Building Restricted Areas - BRA, ICAO Annex 10, National Requirements, etc.). The rules and associated concepts introduced by these regulations are complex and frequently misunderstood by the stakeholders. As protection surfaces are very restrictive, it often leads to conflicts between developers and airspace users – though, in many cases, technical solutions may be available to resolve or minimise adverse impacts.

The aim of this 3-day training course is to provide project developers, planners, authorities and regulators, aerodromes operators and Air Navigation Service Providers with an in-depth overview of the CNS Safeguarding purposes, principles, processes, modelling tools and methods, as well as technical solutions for mitigating impacts and enabling developments.

This course includes an overview of several national safeguarding regulations and practices, and presents numerous practical examples of compatibility assessments and “Specialist Engineering Analysis” as required for infringements of BRA surfaces. These real-life examples cover different CNS equipment, obstacle types (terminal buildings, aircraft and vehicles, cranes, etc.) and illustrate the methods and commercial tools available for such assessments together with their advantages and limitations. Special attention is also given to the assessment of wind farm projects and the presentation of the most recent technical solutions to mitigate shadowing and cluttering issues.

Course Details

Location: In-house
Language: English
Duration: 3 days

Course Content

CNS Equipment and associated EUR Doc 015 surfaces

  • Communication: VHF/UHF
  • Navigation: ILS, DME, G-BAS, VOR, NDB
  • Surveillance: PSR, SSR, SMR, A-SMGCS

Air operations and instrument flight procedures

  • CNS safeguarding principles:
    • Introduction to electromagnetic wave propagation
    • Adverse effects on air operations (Multipath, Shadowing)

CNS safeguarding regulations and processes

  • Process for dealing with authorities, airports, developers
  • Overview of international regulations and guidance material (EUR-DOC 015, Annex 10, PANS-OPS)
  • Overview of national regulations and practices (UK: CAP 670, CAP 738, CAP 674, DE: BAF, DFS, LuftVG §18a, DFS forecasting-tool, Hong-Kong: Airport Height Restriction Plan (AHRP), FAA, Denmark, Ireland: IAA policy "Land use planning and offshore development")

CNS safeguarding modelling and tools for “Specialist Engineering Analysis”

  • Modelling techniques and experience (Line-of-sight, Numerical simulations and limitations)
  • Commercial simulation software and tools overview

Specific examples of what can be caused by project developments etc.

  • Buildings
  • Cranes
  • Mobile structures - aircraft and vehicles
  • Mitigation techniques (e.g. building design, building materials, shielding of buildings, CNS equipment upgrades, procedure design)

Wind farms

  • Effects to en-route navigational aids such as DVOR and DME
  • Effects to communications systems
  • Effects to primary and secondary radars
  • Mitigation techniques


Tony Brown

Tony is a professional engineer with over 40 years of experience with NATS where he was accountable for the technical safeguarding at most of the UK’s major airports. He has also been responsible for providing a professional safeguarding consultancy service for numerous UK and international customers including Hong Kong Airport Authority, Singapore Changi and Dublin Airports.

Tony possesses extensive experience in the support, operation and management of Communication, Navigation and Surveillance equipment (CNS). He is familiar with the use of advanced software modelling tools for the technical safeguarding of all ATC systems, and is a renowned technical expert for a number of navigational systems, such as ILS, DME, VOR, NDB, Radars etc.

At NATS, Tony had a managerial role within a team responsible for all navigational and meteorological systems deployed at fourteen UK NATS supported airports. The scope of this included requirements, procurement, installation, transition and in-service support for airport navigational and meteorological equipment. He was involved in complex projects such as London’s Heathrow and Gatwick Airports preparation for the arrival of the Airbus A380 aircraft, as well as Singapore Changi Airport’s impact assessment of terminal extensions on various CNS systems.

Dr.-Ing. Ferdinand Behrend

Ferdinand in an international aviation expert and trainer. He works as consultant for several federal ministries and companies in the field of aviation. He is specialized for flight operations, air traffic management, airport operations and safety analysis. Ferdinand finished his PhD thesis in 2016 about final approach operation and navigation. He gained exceptional experience and interdisciplinary competence being responsible for several international research projects (SESAR, SESAR 2020) within his position as assistance professor at the department of flight guidance and air transport at the Technical University of Berlin. Furthermore, he was responsible for several courses about flight operations and air traffic control.

He is undertaking projects including safety analysis for air traffic control, developing concept of operations and assessing airport and aircraft operations. Ferdinand works as scientific flight instructor for the Lufthansa Aviation Training for all Airbus, Boeing, Bombardier and Embraer aircrafts. Additionally, he is advisor for the ICAO visual aids working group. Prior his work at the university he was an air traffic control operator for the Deutsche Flugsicherung within area- and approach control.

Target Group

  • Aerodrome operators
  • Aviation or land-use regulators and authorities
  • Project developers and urbanists
  • Wind-farm developers and manufacturers
  • Air Navigation Service Providers
  • CNS equipment manufacturers

Organisational Details

airsight offers this training course on request, worldwide. At the end of the course, all participants will receive an airsight certificate based on EASA training regulations, which is highly recognized throughout the aviation industry.

About airsight Training

airsight Training course quality

airsight operates an ISO 9001 certified Quality Management System and pursues the objective to provide high quality services that fully meet the clients’ needs.

Show more