Obstruction Assessment – Obstacle Limitation Surfaces (OLS)
Confirm whether your development interacts with protected aerodrome surfaces. Independent evidence clarifies impacts, supports design decisions, and helps address safeguarding requirements.
Why OLS Assessment Matters
Obstacle Limitation Surfaces (OLS) are the imaginary planes that protect aerodrome operations; structures that penetrate them can create collision risks, affect flight procedures, or trigger statutory objections from aviation stakeholders. Early OLS assessment reduces the risk of late-stage redesign, objection, or refusal, and helps you present regulator-ready evidence during consultation and planning.
What Our Assessment Provides
We determine which OLS apply to your site and accurately model the relevant protected surfaces using runway parameters and declared distances.
Our assessment identifies any infringements, quantifies exceedances, and explains the practical significance for aviation operations.
We produce clear OLS charts, compliance diagrams, and set out pragmatic mitigation options, for example; height reductions, re-siting, marking/lighting, or agreement with the aerodrome operator. This ensures that you can make informed decisions and engage consultees confidently.
Commission OLS assessments early to inform design, prior to planning submission, when proposing structures such as buildings, turbines, or cranes near licensed or unlicensed aerodromes.
Continue Reading About OLS Assessments
We have always found it very easy to work with Pager Power
Pager Power undertake Radar and Aviation assessments for our wind turbine developments – particularly civil and MoD radar issues. We have always found it very easy to work with Pager Power, they always deliver what they say they will deliver on time. The assessments and advice are always spot on and have allowed us to progress projects with confidence, knowing that we will be able to deal with potential technical challenges should they arise. We have learned to trust and respect their advice and they are our go-to consultants for this type of work.
Guy HopwoodPrincipal Environmental Consultant, ADAS
Pager Power has helped us obtain planning permission across the UK
We first appointed Pager Power in 2004 to assess a number of wind farms in North East England resulting in objections being withdrawn by Newcastle Airport. The company has successfully helped us resolve NATS, Royal Airforce, telecommunications and minor airfield issues. Pager Power provides advice and technical analysis, are easy to talk to and deliver reports on time. Pager Power has helped us obtain planning permission across the UK including a range of onshore wind farms in North East England and Central Scotland.
Tony ScorerHead of Onshore Wind Development, EDF Energy
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