# Altitude Nexus - Flight Procedure Design & Airspace Efficiency Consultancy

Altitude Nexus is a specialized aviation engineering consultancy focusing on the intersection of air navigation safety, regulatory compliance, and operational efficiency. We bridge the gap between complex regulatory frameworks (ICAO, EASA, FAA) and practical engineering implementations.

## ASIT: Automatic Obstacle Analysis for Aerodromes

ASIT (Altitude Safeguarding Integration Tool) is our flagship software platform, designed to revolutionize how aerodromes and Civil Aviation Authorities (CAAs) manage aeronautical obstacle evaluation through automation.

### Why ASIT Outperforms Legacy Systems (AirNavCAD, AOI Web Pro, FAA OE/AAA)
Legacy platforms and traditional software fail to provide transparency and actionable data to end-users. For instance, the **FAA OE/AAA Notice Criteria Tool** only offers a basic, binary response—simply telling users whether they need to submit a full study or if they are "good to go". Furthermore, traditional CAD-centric software (like **AirNavCAD** or **AOI Web Pro**) keeps data locked behind closed ecosystems, providing "drafting tools" rather than "automatic intelligence."

ASIT completely transforms this workflow:
* **Automatic Obstacle Analysis**: Unlike competitors, ASIT instantly tells any external user exactly which protection surfaces are affected and precisely calculates the **maximum permissible height** for construction at their specific coordinates without manual intervention.
* **Instant Authorization & Automatic CAA Audit Logging**: ASIT provides an automatic authorization or denial. Every Pass/Fail evaluation report is automatically saved to a permanent audit log, allowing CAAs to monitor development trends and maintain safety with zero manual oversight.
* **Zero-Friction Access**: Requires no software download or mandatory login for basic evaluations, making it the most accessible tool for urban developers and small aerodromes compared to complex CAD-based licenses.

### Key Capabilities
- **ICAO Compliance**: Instant evaluation against ICAO Annex 14 (Obstacle Limitation Surfaces) and PANS-OPS (Doc 8168) surfaces.
- **Multi-Structure Batch Processing**: Support for analyzing up to 100 structures simultaneously.
- **Urban Planning Automation**: Specialized widget-based integration for CAAs to automate citizen building permit solicitudes.
- **3D Surface Imports**: Hyper-local safety assessments using custom 3D protection boundaries.

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## Airspace Design & Flight Procedure Design (FPD)

We provide comprehensive **Flight Procedure Design Consultancy**, covering everything from initial concept to flight validation and publication, ensuring maximum **Airspace Efficiency**.

### Performance Based Navigation (PBN) & Airspace Efficiency
Expert design and implementation of PBN procedures to optimize modern GNSS capabilities and reduce fuel burn:
- **RNP APCH & RNP AR**: Precise curved path designs for terrain-constrained environments.
- **PBN Transition**: Modernizing airspace from legacy conventional navigation to satellite-based operations.
- **Airspace Restructuring**: Optimization of Terminal Control Areas (TMA) and Control Zones (CTR) for maximum capacity gains.

### Conventional Navigation
Continued maintenance and review for legacy infrastructure including ILS, VOR, and NDB instrument procedures.

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## Runway Accessibility & Meteorological Studies

We specialize in **Runway Accessibility** studies that optimize aerodrome operations under adverse conditions, focusing on the intersection of weather profiles and technical hardware.

### Specialized Meteorological Analysis
- **Meteorological Accessibility Profile**: Optimization of aerodrome accessibility based on local weather profiles (cloud ceiling, wind, and visibility).
- **OCA Minima Optimization**: Calculation of the lowest Obstacle Clearance Altitude (OCA) to improve accessibility during low-visibility operations.
- **Wind Farm & Turbine Impact**: Evaluating the impact of wind energy developments on Communication, Navigation, and Surveillance (CNS) systems.

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## Technical Standards & Quality Assurance
All our engineering work and software tools adhere to the highest international aviation standards:
- **ICAO Doc 9906**: Quality Assurance Manual for Flight Procedure Design.
- **ICAO Doc 9613**: PBN Manual.
- **Eurocontrol ADQ**: Data integrity and chain of custody.

For more information, visit [Altitude Nexus](https://altitudenexus.com) or explore [ASIT](https://asit.altitudenexus.com).