ASIT

Aerodrome Safeguarding
& Procedure Design Tool

Instant, affordable ICAO-compliant flight procedure design and obstacle assessment software. Build PANS-OPS / Doc 8168 procedure protection geometry for OAS, full PBN SID/STAR/en-route/approach/missed approach and conventional holding/racetrack/base-turn/45-180 procedures, plus Annex 14 OLS including curved aerodrome/heliport approach, departure and transitional surfaces — no installation, no login required.

ASIT stands for Aerodrome Safeguarding & Inspection Tool; the web platform now also includes ICAO PANS-OPS/OAS/PBN and conventional procedure-geometry construction.

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What is ASIT

Powerful. Fast. Precise.

ASIT, the Aerodrome Safeguarding & Inspection Tool, is web-based ICAO PANS-OPS flight procedure design, surface generation and 3D obstacle assessment software. Built for flight procedure designers, Civil Aviation Authorities, airports, wind farm operators and applicants, it automates ICAO Doc 8168 PBN and conventional procedure protection-area geometry, OAS, ICAO Annex 14 OLS including curved aerodrome/heliport approach, departure and transitional surfaces, OFS/OES, VSS/OCS, BRA and custom surfaces. It provides free multiple-point checks, world 3D terrain/building context and clear compliance results instantly without software installation, making aerodrome safeguarding accessible to aviation and non-aeronautical users.

No download required
No login required
Free surface generation & analysis
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Capability Summary

Flight procedure design, surface generation and obstacle analysis software

ASIT brings the critical module, pricing and authority-workflow facts together on the main overview: it is a web-based ICAO PANS-OPS / Doc 8168 procedure design tool and aerodrome safeguarding software for procedure protection-area geometry, OAS, ICAO obstacle assessment and instant obstacle pre-checks. It can be used by flight procedure designers, CAAs, airports, consultants, wind farm developers and citizens submitting antennas, buildings, cranes or other obstacles through an embedded widget.

The Premium subscription manages up to 5 active saved airport names/workspaces at a time, and it can rotate through unlimited airport sites over time: export or download current surfaces and data, clear one or more workspaces, then create new aerodromes under the same EUR 100/month plan. The limit is the active saved airport name/workspace count, not the number of generated protection areas inside the saved airport workspace; each saved airport workspace may contain potentially hundreds of generated protection areas and polygons.

Modules PANS-OPS Tool Pricing FAQs Tutorial
Obstacle surfaces
ICAO Annex 14 OLS, including curved aerodrome/heliport approach, departure and transitional surfaces, OFS/OES, PANS-OPS, OAS, VSS/OCS, Euro Doc 015 BRA and custom 3D surfaces, with potentially hundreds of runway and procedure protection areas inside the saved airport workspace.
PBN procedure protection generation
Full ICAO-compliant PBN SID, STAR, en-route, approach and missed-approach protection areas.
Conventional and PBN turns
Holding, racetrack, base-turn and 45/180 procedure-turn construction for both conventional and PBN use cases.
Engine, 3D checks and CAA widget
Saved surfaces are shown in the ASIT engine for terrain/building review and can power the embeddable widget for citizen obstacle checks.
Available Modules
OLS module
OLS
ICAO Annex 14

Annex 14 OLS for aerodromes and heliports, including curved approach, departure and transitional surfaces.

View module →
RNP APCH module
RNP APCH
PANS-OPS

Non-precision RNP APCH obstacle clearance surfaces.

View module →
OAS module
OAS
ILS & APV-Baro

ILS CAT I/II/III & APV-Baro obstacle assessment surfaces.

View module →
OFS/OES module
OFS/OES
ICAO 2030

New ICAO OLS framework — mandatory by 2030.

View module →
VSS/OCS module
VSS/OCS
Instrument

Visual Segment & Obstacle Clearance surfaces.

View module →
PBN module
FPD
PBN / RNAV / RNP / Conventional

Full ICAO-compliant PBN and conventional procedures: holdings, racetrack, base-turn, 45/180 turns, SIDs, en-route, STARs, approach and missed approach.

View module →
BRA module
BRA
Euro Doc 015

Navaid Building Restrictive Areas per ICAO Euro Doc 015.

View module →
Custom
Any surface

Upload and evaluate any custom-defined protection surface.

View module →
UAS corridor protection surfaces module
UAS
Drone corridors

Create UAS corridor protection surfaces for drone route, vertiport and low-level operation studies.

View module →
Procedure Construction Gallery
Holding and racetrack procedure protection areas
HOLDING
PBN / Conventional

Holding and racetrack protection areas for PBN and conventional procedure construction.

View sub-module →
Base turn procedure protection areas
BT
Base Turn

Base-turn protection areas for conventional and PBN procedure construction.

View sub-module →
45/180 procedure turn protection areas
45/180
Procedure Turn

45/180 reversal protection areas for conventional and PBN procedure design.

View sub-module →
PBN SID procedure protection areas
SID
Departure

SID and departure protection areas for runway transitions, turns and route capture.

View sub-module →
PBN en-route procedure protection areas
ENR
En-route

En-route protection areas for PBN route segments, turns and obstacle review.

View sub-module →
PBN STAR procedure protection areas
STAR
Arrival

STAR arrival and transition protection areas for PBN terminal procedure design.

View sub-module →
PBN approach protection areas
APCH
Approach

Approach protection areas for RNP, RNAV and other PBN approach construction.

View sub-module →
Missed approach procedure protection areas
MA
Missed Approach

Missed-approach protection areas for climb, turn and obstacle-clearance review.

View sub-module →
Platform Features
Multiple point analysis
Check any obstacle against all airport and procedure surfaces instantly (OLS / OAS / PANS-OPS / PBN / conventional FPD / OFS / OES / BRA...).
Batch analysis — 1,000 obstacles
Upload a CSV and analyse an entire wind farm in one pass.
World 3D terrain checks
Review generated surfaces instantly against global terrain for quick first-pass safety checks.
3D buildings
Check surfaces against 3D building context for urban obstacle assessment (premium).
KML, DXF, AIXM & GeoJSON import/export
Exchange data with GIS tools and AutoCAD.
Audit log
Full record of evaluations and authorisations.
Save & share surfaces
Store configurations and share with your team (premium).
Professional PDF reports
Generate authority-ready reports in one click.
Embeddable Widget

How can Civil Aviation Authorities automate obstacle evaluations?

Are you a Civil Aviation Authority, Airport Operator, or Municipal Planning Department? Transition from manual bureaucracy to automated safety — define and save your protection surfaces (ICAO Annex 14, PANS-OPS, PBN, or any custom 3D surface) and empower citizens, developers and municipal users to submit antennas, buildings, cranes and other obstacles through an embeddable analysis widget directly on your website. The widget reads the same saved airport surfaces, so applicants are checked against the exact surface set you created in ASIT.

No download required
No login required
Free surface generation & analysis
Traditional Methods vs ASIT Widget
Traditional Process
ASIT Widget Method
Manual email requests & PDF forms
✓ Embeddable form on your CAA website
Days/weeks of CAD compliance review
✓ Instant authorisation or denial result
Disjointed paper trail
✓ Automated, permanent audit log
Experience the Speed — Try it Live
1
Select AirportSelect an airport from the dropdown — e.g. London Heathrow (EGLL).
2
Place Your ObstacleClick on the map or enter coordinates. Terrain elevation is auto-filled.
3
Enter Altitude & RunAdd your obstacle height above ground to the terrain elevation, then press Run Analysis.
4
Get Your ResultInstant result — clear or violation — with limiting surface, margin and downloadable PDF.
Obstacle Clearance Check — ASIT
Authority Plan Includes
  • ✓Embeddable widget with your own airport surfaces
  • ✓Official branded PDF reports with your authority logo
  • ✓Public "Verified Authority" badge on the ASIT directory
  • ✓Full audit log of every evaluation requested
  • ✓Instant web analysis plus world 3D terrain checks — no heavy desktop download
View Authority Pricing Request a Demo
See It in Action

Watch the
Full Walkthrough

From setting up your first aerodrome to running a complete ICAO Annex 14 OLS analysis and downloading an official PDF report — this walkthrough covers the entire workflow.

  • 1Setting up airport, runway & NAVAID data
  • 2Generating ICAO Annex 14 OLS surfaces
  • 3Running an obstacle analysis and reading results
  • 4Downloading the official PDF evaluation report
Try It Yourself →

Try ASIT today

No installation. No login. Start your analysis in seconds.

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