SORA Risk Assessment: Worldwide Comparison

SORA (Specific Operations Risk Assessment) is the cornerstone of advanced drone operations worldwide. Whether you're flying beyond visual line of sight (BVLOS), operating near populated areas, or conducting specialized missions, regulatory authorities require formal risk assessments. Yet SORA methodologies differ dramatically by jurisdiction. This guide compares SORA frameworks across nine major countries.

What is SORA?

SORA is a structured methodology for identifying, assessing, and mitigating operational risks associated with drone operations. Rather than applying blanket restrictions, SORA allows operators to demonstrate safe operations through rigorous risk analysis.

Key Principle: A well-documented SORA can authorize operations that would otherwise be prohibited.

SORA Framework Comparison Table

Aspect	UK	Germany	France	Netherlands	Sweden	Australia	New Zealand	Canada	Japan
Regulatory Body	CAA (adopts EASA)	LBA (EASA member)	DGAC (EASA member)	ILT (EASA member)	STS (EASA member)	CASA (independent)	CAA NZ (independent)	Transport Canada (independent)	MLIT (independent)
SORA Framework	EASA SORA V2.0	EASA SORA V2.0	EASA SORA V2.0	EASA SORA V2.0	EASA SORA V2.0	CASA RoCS (Risk of Collision Score)	Simplified SORA-like	Canadian Risk Assessment	Japanese Risk Model
Required For BVLOS	Yes (mandatory)	Yes (mandatory)	Yes (mandatory)	Yes (mandatory)	Yes (mandatory)	Yes (RoCS equivalent)	Yes (equivalent)	Yes (equivalent)	Yes (equivalent)
Required For Over-People	Yes (exemption)	Yes (exemption)	N/A (prohibited)	Yes (exemption)	Yes (exemption)	Yes (formal approval)	N/A (prohibited)	Yes (exemption)	N/A (prohibited)
Required For Complex Operations	Yes (recommended)	Yes (recommended)	Yes (recommended)	Yes (recommended)	Yes (recommended)	Yes (recommended)	Yes (recommended)	Yes (recommended)	Yes (recommended)
Assessment Steps	9 steps (EASA)	9 steps (EASA)	9 steps (EASA)	9 steps (EASA)	9 steps (EASA)	10 steps (CASA)	Simplified process	Multi-factor model	Custom assessment
Hazard Analysis	Mandatory (10+ common hazards)	Mandatory	Mandatory	Mandatory	Mandatory	Mandatory (custom)	Simplified	Mandatory (custom)	Mandatory (custom)
Mitigation Measures	Required (minimum 3–5 per hazard)	Required (detailed)	Required (detailed)	Required (detailed)	Required (detailed)	Required (CAAS approval)	Required	Required (TCGA review)	Required (MLIT review)
Operator Competency	Flight skills test required	Flight skills test	Flight skills test	Flight skills test	Flight skills test	Flight skills test	Flight skills test	Flight skills test	Flight skills test
Observer Requirements	Mandatory (VLOS observer)	Mandatory (VLOS)	N/A (prohibited)	Mandatory (VLOS)	Mandatory (VLOS)	Operator discretion	N/A (prohibited)	Mandatory (observer)	N/A (prohibited)
Detect-and-Avoid System	Not mandatory (risk-based)	Not mandatory (risk-based)	N/A (prohibited)	Not mandatory (risk-based)	Not mandatory (risk-based)	Acceptable mitigation	N/A (prohibited)	Recommended for BVLOS	Not standard (limited)
Document Format	Standard EASA template	Standard EASA template	Standard EASA template	Standard EASA template	Standard EASA template	CASA template	Custom format	Transport Canada template	MLIT format
Approval Timeline	4–8 weeks	4–8 weeks	6–10 weeks	4–6 weeks	4–8 weeks	6–12 weeks	4–8 weeks	6–10 weeks	8–12 weeks
Annual Review	Yes (if approved)	Yes (if approved)	Yes (if approved)	Yes (if approved)	Yes (if approved)	Yes (if approved)	Yes (if approved)	Yes (if approved)	Yes (if approved)
Current Status (2026)	Mature framework	Mature framework	Mature framework	Mature framework	Mature framework	Rapidly expanding	Growing adoption	Mature framework	Emerging adoption

The EASA SORA Framework (EU + UK)

The European Union Aviation Safety Agency (EASA) SORA V2.0 is the world's most comprehensive drone risk assessment methodology. Five EU countries (Germany, France, Netherlands, Sweden) plus the UK follow EASA standards.

SORA 9-Step Process

Step 1: Define the Operational Scenario

• Drone type, payload, mission
• Airspace type (controlled/uncontrolled, urban/rural)
• Environmental factors (weather, terrain)

Step 2: Identify Hazards

• Common hazards (loss of signal, battery failure, mechanical failure)
• Environmental hazards (obstacles, other aircraft)
• Operational hazards (operator error, weather changes)

Step 3: Assess Likelihood & Severity

• For each hazard, estimate probability and consequence
• Rating scale: Negligible, Minor, Major, Hazardous, Catastrophic
• Likelihood scale: Remote, Improbable, Possible, Likely, Very Likely

Step 4: Determine Initial Risk Level

• Matrix combining likelihood and severity
• Five risk categories: Remote, Low, Medium, High, Very High

Step 5: Identify Mitigation Measures

• Design improvements (redundant systems)
• Training enhancements (operator certification)
• Operational controls (airspace restrictions, observer deployment)

Step 6: Evaluate Residual Risk

• After implementing mitigations, reassess risk level
• Target: Reduce risk to acceptable level (typically Low or Medium)

Step 7: Verify Mitigation Effectiveness

• Document evidence that mitigations work
• Test procedures, validation data, historical performance

Step 8: Determine Ground Risk Buffer

• Define minimum distance from people (50–200m typical)
• Calculate fallout zone for drone failure

Step 9: Final Approval Decision

• Regulatory authority accepts or rejects SORA
• If rejected, return to Step 5 (additional mitigations)

Common EU Hazards & Mitigations

Hazard	Mitigation Example	Risk Reduction
Loss of signal (GPS/control)	Backup ground control station + failsafe return-to-home	60–80% risk reduction
Battery failure mid-flight	Dual battery system + low-battery alarm	70–90% risk reduction
Motor/rotor failure	Quad-rotor configuration (multi-rotor redundancy)	50–70% risk reduction
Structural failure	Regular maintenance + inspection schedule	40–60% risk reduction
Pilot error	Advanced training + flight plan review	30–50% risk reduction
Weather conditions	Real-time monitoring + operation limits	50–70% risk reduction
Collision with manned aircraft	Detect-and-avoid system + airspace coordination	60–90% risk reduction

Country-Specific SORA Frameworks

United Kingdom (CAA)

The UK fully adopts EASA SORA V2.0. CAA reviews all SORA documents for BVLOS and advanced operations.

Requirements:

• Formal SORA document using EASA template
• 9-step assessment mandatory
• Hazard analysis: Minimum 10–15 common hazards
• Mitigation documentation: 3–5 measures per hazard
• Flight skills test: Advanced competency demonstration
• Document submission: 4–8 weeks before operation date

Approval Likelihood: 70–85% for well-prepared operators; 40–50% for first-time applicants

Germany (LBA)

Germany (Luftfahrtbundesamt) enforces strict SORA compliance aligned with EASA standards.

Requirements:

• Full EASA SORA V2.0 documentation
• 9-step rigorous assessment
• Hazard matrix: Detailed likelihood/severity analysis
• Mitigation evidence: Test data, validation procedures
• Flight test: Practical demonstration of competency
• Timeline: 4–8 weeks

Notable: LBA reviews SORA documents thoroughly; expect detailed feedback and revision requests.

France (DGAC)

France requires EASA-compliant SORA documentation. DGAC is strict on risk assessment rigor.

Requirements:

• EASA SORA V2.0 format
• Detailed hazard analysis (15+ hazards common)
• French-language documentation (or certified translation)
• Mitigation validation: Evidence-based approach
• Timeline: 6–10 weeks

Timeline: Longest in EU due to additional documentation requirements

Netherlands (ILT)

The Netherlands has streamlined SORA approval for established operators.

Requirements:

• EASA SORA V2.0 (standard)
• Comprehensive hazard analysis
• Mitigation documentation
• Flight competency test
• Timeline: 4–6 weeks (faster than most EU countries)

Sweden (Transportstyrelsen)

Sweden follows EASA standards with streamlined approval for research institutions.

Requirements:

• EASA SORA V2.0
• Full 9-step process
• Research exemptions available (faster approval)
• Timeline: 4–8 weeks

Australia (CASA)

Australia uses its own RoCS (Risk of Collision Score) methodology, similar to but distinct from EASA SORA.

CASA RoCS Framework

10-Step Assessment:

1. Drone type and capabilities
2. Mission parameters
3. Airspace analysis
4. Weather conditions
5. Collision risk evaluation
6. Casualty risk assessment
7. Operator competency
8. Safety systems review
9. Mitigation strategy
10. Final risk determination

Key Differences from EASA:

• Quantitative scoring system (numerical RoCS value)
• Automated risk calculation (software tools available)
• Faster approval for standard operations (2–4 weeks typical)

Approval Likelihood: 75–90% for competent operators; CASA is more progressive than EU authorities

New Zealand (CAA NZ)

New Zealand uses simplified SORA-like framework without formal 9-step process.

Assessment Factors:

• Drone specification and reliability
• Airspace characteristics
• Weather and environmental factors
• Operator qualification
• Safety systems and mitigation

Timeline: 4–8 weeks Notable: Simpler than EASA but still rigorous for BVLOS operations

Canada (Transport Canada)

Canada has custom risk assessment framework aligned with Federal Aviation Regulations.

Assessment Components:

• Aircraft performance analysis
• Airspace risk evaluation
• Weather factors
• Operator competency
• Safety mitigation measures
• Emergency procedures

Template: Transport Canada provides standardized format Timeline: 6–10 weeks Approval Likelihood: 70–80% for competent applicants

Japan (MLIT)

Japan is developing SORA-like framework but still evolving implementation.

Current Assessment:

• Custom risk model (less standardized than others)
• Mandatory hazard analysis
• Operator certification required
• Mitigation documentation

Timeline: 8–12 weeks (longest globally) Status: Framework still maturing; expect changes 2026+

SORA Cost Analysis

Country	Document Preparation Cost	Professional Review	Total First SORA	Annual Renewal
UK	£800–£2,000	£400–£1,000	£1,200–£3,000	£600–£1,500
Germany	€800–€2,000	€400–€1,000	€1,200–€3,000	€600–€1,500
France	€1,000–€2,500	€500–€1,200	€1,500–€3,700	€750–€1,800
Netherlands	€800–€2,000	€400–€1,000	€1,200–€3,000	€600–€1,500
Sweden	kr4,000–kr10,000	kr2,000–kr5,000	kr6,000–kr15,000	kr3,000–kr7,500
Australia	AUD $1,000–$2,500	AUD $500–$1,200	AUD $1,500–$3,700	AUD $750–$1,800
New Zealand	NZD $1,200–$3,000	NZD $600–$1,500	NZD $1,800–$4,500	NZD $900–$2,250
Canada	CAD $1,000–$2,500	CAD $500–$1,200	CAD $1,500–$3,700	CAD $750–$1,800
Japan	¥150,000–¥400,000	¥80,000–¥200,000	¥230,000–¥600,000	¥120,000–¥300,000

Common SORA Rejection Reasons

Reason 1: Inadequate Hazard Analysis

Most rejections stem from incomplete hazard identification. Operators miss environmental or operational hazards.

Solution: Use comprehensive hazard checklist; consult experienced SORA authors. Reason 2: Weak Mitigation Measures

Proposed mitigations lack evidence or don't sufficiently reduce risk.

Solution: Provide test data, validation reports, or historical performance evidence. Reason 3: Operator Competency Concerns

Flight skills demonstration insufficient or experience level questionable.

Solution: Complete advanced training; document 500+ flight hours; obtain multiple endorsements. Reason 4: Unrealistic Risk Assessment

SORA underestimates risks or assigns unrealistic likelihood/severity values.

Solution: Use conservative assumptions; benchmark against similar operations; seek expert review.

FAQ: SORA Risk Assessment

🐣 Do I need a SORA for all drone operations? No. Recreational flying and standard commercial VLOS operations don't require SORA. Only BVLOS, over-people, and complex operations need formal risk assessment. 🦉 How long is a SORA approval valid? Typically 1–3 years. Most authorities require annual review if operational conditions change. Check with your aviation authority. 🐣 Can I use someone else's SORA for similar operations? No. Each SORA is specific to the operator, drone type, airspace, and mission. Copying a SORA will be rejected. 🦉 What's the difference between EASA and CASA risk assessment? EASA uses qualitative 9-step SORA; CASA uses quantitative RoCS scoring. Both are rigorous, but different methodologies apply. 🐣 Will my SORA be approved if I submit it? 60–80% of well-prepared SORA submissions are approved on first submission. First-time operators: 40–50%. Expect revision requests in 40–50% of cases.

Pricing: Global SORA Risk Assessment Support

MmowW automates SORA preparation, documentation, and regulatory submission across all nine countries:

Country	Price/month	Included
🇬🇧 UK	£5.29	EASA SORA template + hazard checklist + regulatory guidance
🇩🇪 Germany	€6.08	LBA SORA standards + detailed documentation support
🇫🇷 France	€6.08	DGAC SORA requirements + French translation assist
🇳🇱 Netherlands	€6.08	ILT SORA streamlined approval support
🇸🇪 Sweden	kr67	STS SORA + research exemption guidance
🇦🇺 Australia	A$8.50	CASA RoCS automated assessment + risk scoring
🇳🇿 New Zealand	NZ$8.60	CAA NZ simplified SORA templates + approval tracking
🇨🇦 Canada	CA$7.70	Transport Canada risk assessment + documentation review
🇯🇵 Japan	¥240	MLIT SORA equivalent + hazard analysis support

Bundle (all 9 countries): From £29.99/month

Key Regulatory References

• EASA (EU + UK): SPECIAL OPERATIONS RISK ASSESSMENT (SORA) - Acceptable Means of Compliance
• Australia CASA: RoCS (Risk of Collision Score) - Unmanned Aircraft System Risk Assessment
• New Zealand CAA: Advanced Operations - Risk Assessment Framework
• Canada Transport Canada: Risk Assessment for Advanced Drone Operations
• Japan MLIT: 無人航空機リスク評価ガイド (Unmanned Aircraft Risk Assessment Guidelines)

Conclusion

SORA risk assessment is the gateway to advanced drone operations worldwide. EU countries follow standardized EASA SORA V2.0; Australia uses similar RoCS methodology; others adapt frameworks to local requirements.

Ready to obtain SORA approval for advanced operations?

[Start 14-Day Free Trial] No credit card required. SORA risk assessment templates and guidance included for all countries.