Nautical & Aeronautical Chart Analysis for Cartographers
Validate nautical and aeronautical charts for standards compliance and navigational safety
What You Can Do
You can submit draft charts, survey data, or revision proposals to Claude for structured compliance analysis against IHO and ICAO standards. Claude identifies hydrographic hazards, airspace conflicts, symbol inconsistencies, and data gaps—then documents findings with decision rationale for regulatory submissions. This skill accelerates your analytical review phase without replacing specialized charting software or professional judgment.
Features
Validates nautical charts against IHO S-100 and aeronautical charts against ICAO Annex 4 requirements
Flags underwater obstructions, airspace conflicts, and safety-critical symbol inconsistencies
Cross-references multiple hydrographic or terrain survey sources to identify contradictions or gaps
Compares chart series for scale, symbol usage, and geographic continuity
Generates structured hazard assessments and decision rationale for government approval workflows
Reviews coordinate systems, datums, projection parameters, and update schedules
Analyzes proposed changes against previous editions to ensure navigational continuity
Explains chart symbols, conventions, and navigational interpretations for cartographer teams
Example Output
Example 1: IHO S-100 Compliance Review
Input: Draft nautical chart update with new survey data for a coastal harbor
Output:
- ✅ Coordinate reference system (WGS 84) compliant
- ⚠️ Depth contour interval inconsistent: Proposed 5m intervals conflict with neighboring chart using 2m intervals—recommend harmonization
- 🚩 Missing hazard notation: Survey identified 3 wreck positions—recommend adding WRECKS symbols per IHO specifications
- ✅ Scale and projection (Mercator 1:50,000) valid
- Recommendation: Revise contour data and add wreck symbols before regulatory submission
Example 2: Airspace Conflict Detection
Input: Aeronautical chart showing proposed approach corridor and existing military training airspace
Output:
- 🚩 Critical conflict: Proposed commercial approach (FL100-FL250) overlaps military training route (FL150-FL300) for 12nm segment
- ⚠️ Coordination gap: No documented handoff procedures between civilian ATC and military operations
- ✅ Obstacle clearance surfaces meet ICAO Annex 4 minimums
- Action items: Coordinate with military stakeholders before chart publication; document airspace coordination agreement
Example 3: Chart Series Consistency Check
Input: Three adjoining regional charts covering major estuary system
Output:
- ✅ Datum and projection consistent across all three charts
- ⚠️ Scale discontinuity: Chart A (1:50,000), Chart B (1:75,000), Chart C (1:50,000)—recommend standardizing or adding transition inset
- 🚩 Tidal current symbol mismatch: Direction arrows differ in notation between Chart A and Chart B—standardize per IHO color coding
- ✅ Navigational reference points (lights, buoys) properly coordinated
- Recommendation: Align scale across series and update tidal current symbols before release
What's Included
- SKILL.md: Core instruction file with skill overview, usage guidelines, and limitations
- IHO S-100 Compliance Checklist: Structured validation template for nautical chart reviews
- ICAO Annex 4 Standards Reference: Aeronautical chart compliance framework
- Multi-Chart Consistency Worksheet: Template for comparing adjacent charts and series
- Hazard Assessment Framework: Structured decision documentation for regulatory submissions
- Chart Metadata Validation Template: Coordinate system, datum, and projection verification checklist
Who It's For
- Government cartographers managing official nautical chart production and updates
- Hydrographic chart producers coordinating IHO-compliant maritime publications
- Aeronautical chart specialists validating ICAO-compliant navigation products
- Chart quality assurance reviewers conducting pre-publication compliance audits
- Cartographic project managers overseeing multi-chart series consistency and regulatory approval workflows
Best For
- Validating draft nautical charts against IHO S-100 international standards
- Reviewing aeronautical chart revisions for ICAO Annex 4 compliance
- Identifying navigational hazards and data conflicts in survey-based chart updates
- Cross-checking adjacent and overlapping charts for symbol consistency and geographic continuity
- Documenting hazard assessments and regulatory decision rationale for government submissions
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