Civil Law and Air Navigation Satellite Interference Liability in Europe

1. Introduction

Air navigation satellite interference liability concerns civil claims arising when interference with satellite-based navigation systems—particularly GNSS/Galileo/GPS-type signals—causes or contributes to economic loss, property damage, personal injury, transportation disruption, or failure of an aviation/navigation service.

Typical examples include:

deliberate or accidental GNSS jamming;

GNSS spoofing;

interference with satellite navigation signals used by aircraft;

interference affecting satellite-based approach or navigation;

harmful radio-frequency emissions;

interference between satellite systems;

unlawful use of spectrum;

interference affecting aviation, maritime or transport operations;

disruption of satellite communications used for navigation or safety;

negligent operation or maintenance of satellite communications equipment.

There is no single European civil-liability statute specifically called “satellite navigation interference liability.” The legal solution is instead assembled from several bodies of law:

national tort/delict law;

EU electronic-communications and spectrum law;

aviation liability law;

product liability;

contractual liability;

environmental/nuisance-type principles where applicable;

fundamental rights;

EU non-contractual liability;

international telecommunications and space law.

Importantly, direct European reported case law on a private damages claim specifically caused by GNSS jamming or spoofing remains very limited. The cases below therefore include both directly relevant satellite/spectrum authorities and analogical authorities dealing with causation, spectrum rights, satellite communications and non-contractual liability.

2. Meaning of Satellite Navigation Interference

Satellite navigation systems work through signals transmitted from satellites to receivers.

Examples include:

Galileo;

GPS;

GLONASS;

BeiDou.

Aircraft may use satellite navigation for:

positioning;

route navigation;

approach procedures;

timing;

surveillance;

navigation augmentation;

air-traffic management.

Interference can therefore produce consequences far beyond the satellite itself.

Example

GNSS jammer → aircraft navigation disruption → diversion → additional fuel costs → airport disruption → economic loss

Or:

GNSS spoofing → false position information → incorrect aircraft navigation → collision/near miss → personal injury/property damage

The civil-law question becomes:

Who legally caused the damage, and what legal duty was breached?

3. Main Forms of Interference

A. Jamming

Jamming deliberately or accidentally introduces radio-frequency energy that prevents a receiver from properly receiving the satellite signal.

Possible liability

intentional tort/delict;

negligence;

regulatory violation;

contractual breach;

product liability;

potentially criminal liability under national law.

B. Spoofing

Spoofing is more sophisticated.

Instead of simply blocking the legitimate signal, a system may transmit false signals causing the receiver to calculate an incorrect location or time.

For civil liability:

False navigation information can be more difficult to prove than simple signal loss because causation must connect the false signal to the eventual physical or economic damage.

C. Accidental Radio Interference

Interference may result from:

defective transmitters;

poorly configured equipment;

excessive transmission power;

inadequate shielding;

malfunctioning telecommunications systems;

failure to comply with spectrum conditions.

Here the central issue is often negligence rather than intentional interference.

4. The Basic Civil-Liability Formula

A European civil claim can generally be analysed as:

DUTY → BREACH/UNLAWFUL INTERFERENCE → CAUSATION → DAMAGE → REMEDY

For an aviation-related claim:

INTERFERENCE → NAVIGATION FAILURE → OPERATIONAL CONSEQUENCE → DAMAGE → CAUSATION → LIABILITY

5. Case Law

Case 1 — Eutelsat SA v ARCEP and Inmarsat Ventures SE, C-515/19

Court: CJEU
Judgment: 15 April 2021

This is one of the most important EU satellite-spectrum cases.

The dispute concerned the harmonised use of the 2 GHz radio-frequency band for mobile satellite services and the obligations imposed upon selected satellite operators.

The CJEU examined:

satellite systems;

complementary ground components;

radio-spectrum use;

service coverage;

obligations imposed upon satellite operators.

The judgment demonstrates that satellite operators do not possess unrestricted freedom to use spectrum: their rights are connected with EU harmonisation and regulatory conditions. (Infocuria)

Relevance to interference liability

Although Eutelsat is not a damages case for GNSS jamming, it is highly relevant to the underlying legal structure.

It supports the proposition that:

Satellite communications operate within legally defined spectrum rights and technical obligations.

A party operating equipment outside its authorised technical conditions may potentially expose itself to regulatory and, depending on national law and causation, civil consequences.

6. Case 2 — Viasat UK Ltd and Viasat Inc. v IBPT, C-100/19

Court: CJEU
Judgment: 5 March 2020

This case concerned mobile satellite services and the obligations of operators using harmonised radio spectrum.

The CJEU considered the legal consequences of failure to comply with the requirements applicable to satellite-service operators, including territorial/population coverage obligations. (Infocuria)

Relevance

The case is useful for establishing that:

satellite operators have legally defined obligations;

authorisation conditions matter;

satellite service is subject to EU regulatory supervision;

failure to comply with technical/service obligations can have legal consequences.

Civil-law analogy

If non-compliance with technical conditions causes measurable damage, the claimant may use the regulatory breach as part of the evidence supporting a national civil claim.

However:

Regulatory non-compliance does not automatically establish civil liability.

The claimant would still normally need to establish causation and legally recoverable damage under the applicable national law.

7. Case 3 — Airbus Defence and Space and Marlink Events v European Defence Agency, T-105/24

Court: General Court
Judgment: 1 July 2026

This is a particularly important current 2026 satellite-communications authority.

The case concerned an EU procurement procedure for:

satellite communications;

satellite equipment;

multiple frequency bands;

related services.

The General Court found unlawful defects in the procurement process and awarded compensation for the applicants' loss of opportunity. It awarded Airbus Defence and Space EUR 3,864,315 and Marlink Events EUR 458,185. (Curia)

Relevance to satellite interference

This was not a satellite-interference case.

Its importance is instead methodological:

European courts can recognise compensable economic loss arising from unlawful conduct concerning sophisticated satellite-communications systems.

It demonstrates the availability of non-contractual liability and compensation for economic loss within the EU institutional legal order.

Important distinction

Do not cite T-105/24 as authority that GNSS interference itself creates liability. It is analogical authority concerning satellite communications and EU non-contractual liability.

8. Case 4 — Galileo International Technology and Others v Commission, T-279/03

Court: Court of First Instance/General Court
Judgment: 10 May 2006

This case involved the EU's Galileo satellite-navigation project.

The claimants argued that the EU's use of the name “Galileo” caused harm to their trademarks and trade names.

The Court dealt with:

the Galileo satellite-navigation project;

EU non-contractual liability;

damages;

causation;

unlawfulness;

unusual and special damage. (Infocuria)

Relevance

Although the dispute was about intellectual-property interests rather than signal interference, it is especially valuable because it concerns Galileo itself.

It demonstrates that activities associated with a European satellite-navigation programme can give rise to litigation concerning:

damage;

causation;

EU institutional responsibility;

non-contractual liability.

The General Court also recognised that EU courts can, where the legal requirements are satisfied, grant forms of reparation beyond purely monetary compensation, including injunctive relief. (curia)

9. Case 5 — Comunidad Autónoma del País Vasco and Itelazpi v Commission, Joined Cases C-66/16 P to C-69/16 P

Court: CJEU
Judgment: 20 December 2017

These cases concerned State aid relating to digital terrestrial television and satellite broadcasting, with SES Astra involved in the proceedings.

The CJEU examined:

telecommunications infrastructure;

terrestrial versus satellite platforms;

State aid;

competitive advantage;

technological alternatives.

(Infocuria)

Relevance

The case is not about physical signal interference.

Its importance for satellite civil law lies in showing that satellite services operate within a wider European regulatory environment involving:

infrastructure;

competition;

public funding;

technological neutrality;

access to communications markets.

It can therefore be used as background regulatory authority, not as direct proof of tort liability.

10. Case 6 — SES Astra SA and Satellite Broadcasting Cases

The SES Astra litigation concerning Spain's transition from analogue to digital television involved complaints that public funding for terrestrial infrastructure distorted competition with satellite broadcasting.

The General Court and CJEU considered whether State measures advantaged terrestrial broadcasting platforms over satellite platforms. (curia)

Civil-law relevance

The cases demonstrate that interference with the commercial position of a satellite operator can have legally significant consequences even where there is no physical damage to a satellite.

They are useful for understanding:

economic loss;

competitive harm;

satellite operators' commercial interests;

regulatory causation.

Again, these are not direct private-law GNSS interference damages cases.

11. Case 7 — Commission v Hungary, C-92/23

Court: CJEU, Grand Chamber
Judgment: 26 February 2026

This is an important and very recent spectrum authority.

The case concerned national measures affecting the right of a commercial radio station to use an FM radio frequency.

The CJEU considered:

radio-spectrum management;

proportionality;

transparency;

non-discrimination;

good administration;

Article 11 of the EU Charter;

freedom of expression and information.

The Court found Hungary had failed to fulfil obligations under EU electronic-communications rules and the principle of proportionality. (Curia)

Relevance to satellite navigation

The case concerns terrestrial radio spectrum rather than satellite navigation.

Nevertheless, it establishes an important principle:

Radio-frequency rights are legally regulated resources, and restrictions or interference with those rights must comply with EU regulatory principles.

For satellite navigation, this becomes relevant when determining whether:

a frequency allocation was lawful;

interference was authorised;

spectrum-management decisions were proportionate;

regulatory authorities complied with EU law.

12. Case 8 — Europa Way S.R.L. v Italy

Court: ECtHR

The case concerned access to digital-terrestrial television frequencies and the regulatory allocation of frequency-use rights.

The ECtHR examined interference with the applicant company's ability to obtain rights to use frequencies and stressed the importance of regulatory independence, legal certainty and safeguards against arbitrariness.

Relevance

Again, this is not a GNSS-jamming case.

But it supports the broader European principle that:

Access to communications frequencies can have economic and fundamental-rights dimensions.

That principle can become relevant where a satellite operator argues that regulatory interference or unlawful spectrum management caused economic damage.

13. Case 9 — SES Astra v Commission, C-212/22 P(I)

The proceedings involved SES Astra and disputes concerning EU institutional proceedings relating to telecommunications and State aid.

The CJEU considered procedural questions including intervention and Article 47 of the Charter. (Infocuria)

Relevance

Its value is limited for substantive interference liability, but it illustrates the continuing role of satellite operators in EU telecommunications litigation.

It should therefore be treated as supporting background authority rather than direct civil-liability authority.

14. Important Warning About the Case Law

There is currently no large body of European case law directly deciding:

“A private person intentionally jammed a Galileo/GNSS signal, an aircraft suffered loss, and the jammer was held civilly liable.”

Therefore, an academically accurate answer must not pretend that existing CJEU cases are direct GNSS-jamming precedents.

The law is instead constructed through:

spectrum regulation + national tort law + aviation law + product liability + contract + causation principles.

15. Who Could Be Liable?

Potential defendants include:

1. Intentional jammer

Example:

A company deliberately operates a high-powered transmitter that disrupts aircraft GNSS signals.

Potential basis:

intentional tort;

unlawful interference;

regulatory breach;

property/economic damage.

2. Equipment manufacturer

Example:

A defective transmitter accidentally emits harmful frequencies.

Potential claims:

product liability;

negligence;

contractual warranty.

3. Satellite operator

Potential liability could arise where the operator itself:

negligently operates the system;

breaches technical obligations;

fails to maintain equipment;

violates contractual obligations.

But satellite operators should not automatically be liable simply because their satellite is involved in the communications chain.

4. Ground-station operator

A malfunctioning ground station may generate interference affecting satellite services.

Potential issues include:

negligence;

technical compliance;

maintenance;

causation.

5. Public authority

A government or regulator may face:

administrative-law challenges;

EU-law liability in appropriate circumstances;

national State liability;

human-rights claims.

The legal requirements for State liability are distinct from ordinary private negligence.

16. Civil Liability for GNSS Jamming

Consider:

Company A operates a powerful radio transmitter.
The transmitter interferes with GNSS signals.
Airport B experiences navigation disruption.
Flights are diverted.
Airline C loses €2 million.

The claimant must establish:

Duty

Did Company A owe a legal duty not to cause unlawful harmful interference?

Breach

Did it operate equipment contrary to applicable technical/spectrum rules?

Causation

Did its emissions actually cause the GNSS disruption?

Damage

Did the airline actually suffer legally recoverable loss?

Remoteness

Was the economic loss sufficiently connected to the interference?

17. Spoofing Creates a More Difficult Causation Problem

Consider:

Spoofing transmitter → false GNSS location → aircraft navigation error → emergency diversion → passenger injury

The claimant must establish:

existence of spoofing;

source of spoofing;

technical causation;

aircraft reception of false information;

resulting operational decision;

injury or loss.

This is technically complicated because several independent causes may exist.

18. Multiple Causes

Suppose:

GNSS interference occurs, but the aircraft's inertial navigation system was also malfunctioning.

The defendant may argue:

“The interference was not the sole cause.”

The claimant may respond:

“The interference materially contributed to the accident.”

The applicable national law determines the precise causation test.

This can involve:

concurrent causation;

contributory negligence;

intervening acts;

foreseeable consequences;

loss of chance;

apportionment.

19. Aviation Liability

Where GNSS interference causes an aviation accident, the Montreal Convention may become relevant to passenger injury or death claims.

The important distinction is:

Satellite operator's liability

Usually analysed under:

national civil law;

telecommunications law;

contractual arrangements;

product liability;

possibly space/satellite-specific contractual rules.

Airline liability

May involve:

Montreal Convention;

EU aviation legislation;

national law.

Thus:

A satellite operator and an airline are not automatically subject to the same liability regime.

20. Product Liability

Satellite-navigation equipment is increasingly software-dependent.

Potential products include:

GNSS receivers;

avionics;

antennas;

signal processors;

navigation computers;

communication equipment.

Under the revised EU Product Liability Directive, software is expressly brought within the modern product-liability framework.

This could become important where defective software:

incorrectly processes GNSS signals;

fails to reject spoofed signals;

incorrectly identifies interference;

generates dangerous navigation information.

The crucial distinction is:

external interference versus defective product response to interference.

21. Contractual Liability

Satellite-navigation services can be supplied under contracts containing:

availability guarantees;

service-level agreements;

reliability requirements;

cybersecurity obligations;

technical specifications;

force-majeure clauses;

limitation-of-liability clauses.

For example:

Satellite operator promises 99.99% service availability but negligently fails to maintain a ground station.

A contractual claim may be easier than a general tort claim if the contract clearly defines the operator's obligations.

22. Cybersecurity Dimension

Modern satellite navigation is increasingly connected to cybersecurity.

Interference may involve:

cyberattack;

spoofing;

compromised ground infrastructure;

manipulated timing data;

malicious firmware;

compromised receivers.

This produces a hybrid claim:

Cyberattack + telecommunications interference + aviation damage.

Evidence may therefore require:

cybersecurity experts;

satellite engineers;

aviation experts;

digital-forensics specialists.

23. Regulatory Compliance Does Not Automatically Equal Civil Liability

A critical principle is:

Regulatory violation ≠ automatic damages.

For example:

A company may violate a spectrum rule, but the claimant may still need to prove:

violation → actual interference → actual damage → legal causation.

Conversely, conduct might potentially create civil liability even where the claimant cannot point to a specific administrative penalty, depending on national tort law.

24. Economic Loss

Satellite interference may cause purely financial losses:

airline diversion costs;

fuel costs;

airport disruption;

cancelled flights;

delayed cargo;

insurance losses;

satellite-service downtime;

loss of customers;

contractual penalties.

Whether pure economic loss is recoverable depends substantially on the applicable national law.

This is particularly important because European civil-law systems do not all treat pure economic loss identically.

25. Physical Damage

The strongest civil claim usually arises where interference produces physical consequences.

For example:

GNSS spoofing → aircraft navigation failure → aircraft accident → passenger death.

Potential damages could include:

death;

bodily injury;

aircraft damage;

property damage;

medical expenses;

loss of earnings.

The more direct the causal chain, the easier it generally becomes to formulate the claim.

26. Injunctions

A claimant may seek not only damages but also preventive relief.

For example:

“Stop transmitting the interfering signal.”

This is particularly important for continuing interference.

The Galileo International Technology litigation is useful by analogy because the General Court recognised that EU non-contractual liability remedies can, where legally appropriate, include forms of non-monetary reparation such as an injunction. (Infocuria)

27. Spectrum Rights as a Legal Interest

European telecommunications law treats spectrum as a regulated public resource.

Important regulatory principles include:

transparency;

non-discrimination;

proportionality;

efficient spectrum use;

technology neutrality;

service neutrality;

interference management.

The CJEU's recent Commission v Hungary, C-92/23 judgment demonstrates the continuing importance of proportionality and regulatory safeguards in decisions concerning radio-frequency rights. (Curia)

28. Cross-Border Interference

Satellite signals naturally cross national boundaries.

A jammer located in:

Country A

could interfere with aircraft operating in:

Country B

using satellite signals originating from:

space

and cause economic damage to an airline incorporated in:

Country C.

This produces a classic cross-border civil-liability problem.

Questions include:

Which country's courts have jurisdiction?

Which country's tort law applies?

Where did the damage occur?

Where did the harmful conduct occur?

Was the damage foreseeable?

Does the applicable law permit recovery of pure economic loss?

29. International Space Law

The Outer Space Treaty and related international space instruments provide an important international framework.

However, these treaties do not simply create a comprehensive private European tort action for every case of GNSS interference.

The practical civil claim will generally still require:

national civil law + applicable EU legislation + international rules + contractual arrangements.

30. Evidence in Satellite-Interference Litigation

Technical evidence can be decisive.

Important evidence includes:

spectrum-monitoring data;

GNSS signal logs;

receiver logs;

aircraft flight-data records;

ADS-B information;

satellite telemetry;

ground-station records;

radio-frequency measurements;

cybersecurity logs;

timing data;

aviation incident reports;

regulator investigations.

Expert witnesses

A complex case could require:

satellite engineer;

RF engineer;

aviation expert;

GNSS specialist;

cybersecurity expert;

economist;

accident-reconstruction expert.

31. Standard of Proof and Causation

The claimant may have to prove:

Signal interference → navigation degradation → operational effect → damage

For example:

Jamming

↓

GNSS signal unavailable

↓

Aircraft navigation system switches mode

↓

Crew makes emergency decision

↓

Flight diverted

↓

Airline suffers measurable loss

The more independent events in the chain, the more difficult causation can become.

32. Defences

Potential defendants may argue:

A. No interference

The defendant denies its signal caused the disruption.

B. No causation

Another system caused the failure.

C. No legally protected interest

The claimed economic loss may not be recoverable under the relevant national law.

D. Contributory negligence

The claimant failed to maintain adequate backup navigation systems.

E. Force majeure

The interference was caused by an unforeseeable external event.

F. Regulatory authorisation

The defendant argues that its transmissions were lawfully authorised.

But:

Authorisation is not necessarily an absolute defence if the conduct nevertheless violates another legal duty or causes compensable harm.

The exact result depends on national law.

33. Relationship Between GNSS Interference and Aviation Safety

Aviation is particularly sensitive because GNSS can support:

navigation;

approach;

timing;

surveillance;

route planning.

Therefore, interference may create both:

private economic loss

and

public safety consequences.

This can trigger parallel:

regulatory investigation;

aviation investigation;

civil litigation;

contractual disputes;

insurance claims;

potentially criminal proceedings.

34. Six+ Key Cases at a Glance

The first four are particularly useful for a satellite-focused answer, while the others provide broader spectrum and regulatory principles. (Infocuria)

35. Key Legal Principles

Principle 1

Satellite navigation is not legally unregulated merely because the signal originates in outer space.

Principle 2

Radio spectrum is a regulated legal resource.

Principle 3

Satellite operators can be subject to technical and service obligations. — Eutelsat; Viasat. (Infocuria)

Principle 4

Galileo-related activities can give rise to litigation concerning legally protected interests and EU non-contractual liability. — Galileo International Technology. (Infocuria)

Principle 5

Satellite-communications procurement can generate compensable economic loss where unlawful EU institutional conduct satisfies the applicable liability requirements. — Airbus Defence and Space/Marlink. (Curia)

Principle 6

Spectrum regulation must respect proportionality, transparency and non-discrimination. — Commission v Hungary. (Curia)

Principle 7

Regulatory breach does not automatically establish private civil damages.

Principle 8

Causation is likely to be the central difficulty in GNSS interference litigation.

36. Exam-Oriented Framework

Use this structure in an answer:

1. Identify the interference

Jamming / spoofing / accidental emission.

2. Identify the protected interest

Navigation / property / contract / economic interest / personal safety.

3. Identify the defendant

Jammer / operator / manufacturer / regulator / service provider.

4. Identify the legal duty

Tort / contract / spectrum regulation / product liability.

5. Prove breach

Illegal transmission / negligence / defective equipment / regulatory violation.

6. Prove causation

Interference → navigation failure → damage.

7. Establish damage

Personal injury / property damage / economic loss.

8. Determine jurisdiction

Cross-border private international law.

9. Determine remedy

Damages / injunction / restitution / contractual remedy.

37. Ultra-Basic Revision Formula

SATELLITE INTERFERENCE = SIGNAL + SPECTRUM + DUTY + BREACH + CAUSATION + DAMAGE + LIABILITY + REMEDY

For aviation:

JAMMING/SPOOFING → GNSS FAILURE → AIRCRAFT EFFECT → ACCIDENT/LOSS → CAUSATION → CIVIL LIABILITY

For cross-border cases:

COUNTRY A INTERFERENCE → SPACE SIGNAL → COUNTRY B AIRCRAFT → COUNTRY C LOSS → CHOICE OF LAW

Conclusion

Air navigation satellite interference liability in Europe is an emerging and technically complex area rather than a settled standalone field of civil law. European courts have developed significant jurisprudence on satellite services, radio-spectrum rights, Galileo, telecommunications regulation and non-contractual liability, but there remains comparatively little reported European case law directly awarding civil damages for GNSS jamming or spoofing.

The most useful authorities are Eutelsat (C-515/19) and Viasat (C-100/19) for satellite-spectrum obligations; Galileo International Technology (T-279/03) for Galileo and EU non-contractual liability; and the very recent Airbus Defence and Space/Marlink (T-105/24) for satellite communications and compensable economic loss. (Infocuria)

The central civil-law principle is:

A person or entity responsible for unlawful or negligent interference with satellite-navigation signals may potentially incur civil liability when the claimant can establish a legally recognised duty, breach or unlawful interference, a sufficiently direct causal connection, and recoverable damage under the applicable national and European legal framework.

One-line exam answer:

European air-navigation satellite interference liability is determined through the interaction of national tort and contract law, EU spectrum and telecommunications regulation, aviation liability, product liability and cross-border private international law, with causation and proof of actual damage forming the central issues.