Flight procedures

Obstacle assessment

Weather intelligence


Flight procedures


The primary goal of flight procedure design is to provide terrain and obstacle clearance during departure, en route, arrival, approach and missed approach phases; other factors are then considered, notably environmental issues (both particulate and noise pollution) and optimisation of air traffic flow. This is an iterative process that involves a number of related disciplines and requires participation of a wide array of stakeholders.


Flight procedures are an integral component of the airspace structure used every day by thousands of aircraft at airports around the world. As such, it is of paramount importance to ensure the safety and efficiency of these procedures, so they are subject to a rigorous quality assurance system.

The aim of validation is to obtain a qualitative assessment of procedure design, including its inputs, methods, and outputs in order to ensure the safety, data accuracy, integrity, flyability and fitness for use of the procedure.

Periodic review

All airspace structures, including flight procedures, exist in a dynamic and changing environment. To ensure their continued safety, fitness for purpose and compliance with evolving criteria, procedures are subject to periodic review every few years or whenever justified for operational or other reasons.

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Obstacle assessments

We offer two kinds of pre-planning services for evaluating the effect of wind farms – and other engineering projects – on the aviation environment.

  • An obstacle limitation surface (OLS) assessment ensures that your project does not interfere with normal airport operations. Such an assessment may be necessary for projects located up to 20 km from an airport.
  • An air traffic control surveillance minimum altitude (ASMA) assessment checks the possible influence of a project on aeronautical radar systems.

Having a clear idea of the likely impact early on can save developers a considerable amount of money and headaches.

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Weather intelligence


We develop and host sophisticated weather forecast APIs for professional use in the aviation, energy and defence industries. Our solutions are cloud-ready or can be hosted on-premises depending on your requirements.


We estimate probable minima requirements and profitability of VFR to IFR transition by analysis of historical aviation weather data at the airport site.

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Training offer

Something for everyone

We propose a selection of short and long courses on flight procedure design topics of interest to practising designers, database coders, cartographers, pilots and air traffic controllers.

Military design

Uniquely, we provide training on STANAG 3759 (AATCP-1), the NATO version of PANS-OPS, for both experienced civilian designers and ab-initio students.


Get in touch with us for the full list of courses and available dates. We can also deliver training at your location and, on some subjects, online.

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About us


We are certified and experienced procedure designers with a background in geomatics. As qualified pilots we understand many of the practical implications of our design decisions.


Before a project we take time to evaluate all its aspects and context so as to achieve the desired result according to a mutually agreed specification, on time and on budget.


We can provide specific services in the context of a wider project consisting of multiple contractors, or an integrated service guiding the client through all aspects of a job.


Approval by the Civil Aviation Authority of our home state ensures proper and effective oversight of our activities, which ultimately results in our clients receiving a service they can trust and rely on.