Can one ASIT subscription be used for different airports?

Yes. An ASIT subscription allows up to 5 active saved airport workspaces at a time. Consulting firms can export their data, clear one or more workspaces and start fresh with different aerodromes under the same €100/month plan, allowing unlimited airport rotations over time. Each saved airport workspace can contain potentially hundreds of generated protection areas, including multiple runway OLS, VSS/OCS, holdings, racetracks and PBN or conventional procedure surfaces.

Does ASIT include conventional and PBN procedure construction?

Yes. ASIT includes PBN/RNAV/RNP and conventional flight procedure construction modules, including holding, racetrack, base-turn, 45/180 procedure turns, SID, STAR, en-route, approach and missed approach protection areas.

ASIT Tutorial — Altitude Nexus

Step-by-Step Guide

Interactive Walkthrough

Use the arrows or click a step above to navigate. Each slide covers one stage of the analysis workflow.

Create Airport — replace with ASIT screenshot

Step 1 of 7

Setup

Search or create your Airport

Start by registering your aerodrome. ASIT uses ICAO designator, reference datum and aerodrome elevation to anchor all surface calculations to the correct geographic position.

ICAO code or name — used to identify your aerodrome across all modules.

Airport name — e.g. "Heathrow" or "EGLL" required.

ICAO aerodrome category — 1, 2, 3 or 4. Determines OLS dimensions.

Free Premium Authority

Choose a Module — replace with ASIT screenshot

Step 2 of 7

Select

Choose a Module

ASIT provides 9 specialised modules, covering aerodrome surfaces, UAS corridors and full ICAO-compliant PBN/RNAV/RNP plus conventional procedure construction. Select the one matching your regulatory requirement and configure its parameters.

OLS — ICAO Annex 14 Obstacle Limitation Surfaces (most common use case).

OAS — for ILS CAT I/II/III and APV-Baro procedure design (OCA/H).

PBN + conventional — holdings, racetrack, base-turn, 45/180 turns, SID, STAR, en-route, approach and missed approach.

Custom — upload any KML, AIXM or DXF surface and evaluate obstacles against it.

View all included features

Add Runway Data — replace with ASIT screenshot

Step 3 of 7

Configure

Add more surfaces

Define each runway, procedure or corridor and save the generated surfaces under the active airport workspace. Saved surfaces then appear in the ASIT engine for 3D terrain and building review, and the same surface set can power the embeddable widget so external obstacle queries are checked against your current airport data.

Add extra surfaces — use the same airport name to add multiple runway OLS sets, VSS/OCS, holdings, racetracks and procedure protection areas to the active airport.

Delete for new aerodromes — export first, delete the saved airport, reset the active airport count to zero and create a new aerodrome under the same plan.

Engine and widget reuse — saved surfaces are available for engine checks and authority widget workflows.

ICAO Annex 14 Save included in Premium

Step 4 of 7

Widget

Offer public obstacle pre-checks

Once surfaces are saved in ASIT, the authority widget can expose those same public airspaces to citizens, municipalities and developers. They can click the map, add cranes, antennas or buildings, and get an instant pre-check before a formal submission.

Same surface set - the widget evaluates against the saved airport surfaces created by the engineer or CAA user.

Free citizen access - non-aeronautical users can screen a planned obstacle without learning ASIT.

Better service channel - CAAs can guide applicants before manual review and keep clearer obstacle-query records.

Citizen pre-check CAA widget Uses saved ASIT surfaces

Input Obstacles — replace with ASIT screenshot

Step 5 of 7

Analyse

Input Your Obstacles

Add one obstacle at a time, or upload an entire inventory via CSV batch upload. ASIT checks every obstacle against every surface simultaneously — no manual iteration.

Single-point mode — enter latitude, longitude and absolute altitude (MSL). Instant result.

CSV batch mode — analyse up to 1,000 obstacles (wind farms, building inventories) in one upload. Premium.

Tip: Altitude must be absolute (MSL), not height above ground. The widget auto-fills terrain elevation when you click the map.

Single point — Free Batch CSV — Premium

Read Results — replace with ASIT results screenshot

Step 6 of 7

Review

Read the Results

ASIT evaluates every obstacle against every surface and returns a structured result immediately. The 3D engine lets you spatially verify infringements before committing to a report, while the widget uses the saved airport surfaces for public pre-checks.

Obstacle Clear — the obstacle is below all evaluated surfaces. Shows clearance margin per surface.

Violation Detected — the obstacle penetrates one or more surfaces. Shows limiting surface and excess height.

3D visualisation — generated surfaces overlay the terrain. Scroll, rotate and zoom to inspect geometry.

Instant results All surfaces evaluated simultaneously

Download Report — replace with ASIT screenshot

Step 7 of 7

Export

Download Your Report

Generate a professional PDF evaluation report with a single click. Authority plan holders receive an official branded report with their authority logo — ready to submit to CAAs, planning authorities and ANSPs.

PDF report — includes obstacle data, surface results, clearance margins and all evaluated surfaces in a table.

KML, AIXM & GeoJSON export — share surface geometry with GIS tools, AutoCAD or aeronautical databases.

Audit log — every report generation is recorded. Premium and Authority users can export the full log.

Basic PDF — Free Official branded — Authority KML / AIXM / GeoJSON — Premium

Step 1 of 7

Saved surfaces move into the engine and widget

When you create and save a surface under an airport, it is not just an exported file. It becomes part of that airport workspace, appears in the ASIT engine for 3D terrain and building review, and can be used by the embeddable widget so public obstacle submissions are checked against the same current surface set.

Generate and save

Create OLS, OAS, PANS-OPS, PBN, conventional, UAS corridor or custom surfaces under the active airport.

Review in the engine

Open the saved airport in ASIT and inspect the generated surfaces against terrain, buildings and obstacles.

Use in the widget

The authority widget can use those same saved surfaces for citizen, developer and municipal obstacle checks.

Watch the Complete Tutorial

This video covers the full ASIT workflow — airport setup, surface generation, obstacle analysis and PDF report download — in one continuous demonstration.

00:10

Airport Setup

00:50

Extras

01:32

Obstacle Analysis

01:57

PDF Download

How to Use ASIT