Altitude Nexus - Aerodrome Safeguarding

Aerodrome Safeguarding

We work with airport operators, airspace users, and project developers to manage new and existing developments, ensuring the highest levels of aviation safety.

Obstacle Limitation Surfaces (OLS)

Analysis of the airspace around aerodromes to be maintained free from obstacles

Automatic Airport Surface Infringement Tool (ASIT)

Accurately analyse obstacles automatically to ensure these do not penetrate or threaten airport protection surfaces

Obstacle Free Surfaces (OFS) and Obstacle Evaluation Surfaces (OES)

Establishment of the new ICAO's OLS and development of tailored surfaces

Aeronautical Studies

Assessment of OLS infringements on safety and regularity of operations of aeroplanes

Analysis of the airspace around aerodromes to be maintained free from obstacles

International regulations issued by the International Civil Aviation Organization (ICAO), as set out in Annex 14, together with requirements from the European Union Aviation Safety Agency (EASA), specify that airspace surrounding aerodromes must be kept free of obstacles.

To meet these requirements, Obstacle Limitation Surfaces (OLS) are established, which should ideally remain free from any penetrations.

Altitude Nexus supports aerodromes and regulatory authorities in developing the applicable OLS and in identifying and assessing any obstacle penetrations.

Airport Surface Infringement Tool

Accurately analyse obstacles to ensure these do not penetrate or threaten airport protection surfaces

For airport planners, tracking permanent and temporary obstacles at the airport or in its vicinity is vital for safe operations. ASIT allows users to accurately and efficiently analyse obstacles to ensure these do not penetrate or threaten the obstacle limitation surfaces (OLS) defined inside (or outside) regulatory guidelines.

ASIT is an effective tool for airport planners, operators and safety managers involved in protecting and monitoring the airfield and its runway departure and approach paths.

ASIT also allows defining airspace horizontal and vertical restrictions for UAS (drones)

Complex operational Easements may also be defined in our software, enabling our clients to automatically assess obstacle infringement in flight procedures defined with turns, such as the missed approach shown below;

- OLS

- OAS

- OIS

- OCS

Complex Operation PANS-OPS (or different) Easements such as:

- Missed approach

- Departures with turns

- Procedure turns

Radio Easements:

- DME

- VOR

- ILS...

Update OLS modification (mandatory in 2030):

- OFS

- OES

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Pricing

Obstacle Free Surfaces (OFS) and Obstacle Evaluation Surfaces (OES)

Establishment of the new ICAO's OLS and development of tailored surfaces

ICAO Obstacle Limitation Surfaces Task Force (OLSTF) has proposed replacing the current OLS framework with a new dual concept consisting of Obstacle Free Surfaces (OFS) and Obstacle Evaluation Surfaces (OES). In addition, a new classification system—Aeroplane Design Groups (ADG)—is foreseen for the design of the OFS and OES.

Altitude Nexus supports aerodromes and regulatory authorities in understanding this new concept and in developing the associated Obstacle Free Surfaces and Obstacle Evaluation Surfaces.

Furthermore, tailored OES can be established to address the specific operational needs of individual aerodromes, enabling a more efficient and flexible use of surrounding areas.

Assessment of OLS infringements on safety and regularity of operations of aeroplanes

Physical safeguarding is the process of preventing collisions between aircraft and obstacles, such as new constructions or other objects. It involves ensuring that obstacles do not penetrate applicable obstacle protection surfaces, including the Obstacle Limitation Surfaces (OLS) defined in ICAO Annex 14.

In practice, however, infringements of these surfaces cannot always be avoided. Penetrations of the OLS may be acceptable where an obstacle assessment or aeronautical study demonstrates that there is no adverse effect on the safety of flight operations. Conversely, even objects located below or outside the OLS may, in certain circumstances, have an operational impact.

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