Legally protected communication optical cables

Communication optical cables, especially undersea cables, must be protected through a combination of international law compliance, national regulations, and operational safeguards to prevent accidental or intentional damage.

Legal Framework

International Law: The primary international legal framework for protecting undersea cables is the 1982 United Nations Convention on the Law of the Sea (UNCLOS).

UNCLO

S grants states the right to lay cables on the high seas and continental shelves while requiring them to prevent willful or negligent damage to these cables. Articles 112–115 specifically address the freedom to lay cables, the obligation to penalize damage, and indemnity for vessels taking precautions to avoid cable damage. Earlier treaties, such as the 1884 Convention for the Protection of Submarine Telegraph Cables, also provide foundational protections.

National Regulations: Many countries have enacted laws to protect cables within their territorial waters. For example, the United States has the Undersea Cable Control Act (2023), which restricts foreign access to cable technologies and establishes cable protection zones. National authorities, including telecom regulators, cybersecurity agencies, coast guards, and civil protection bodies, often coordinate to enforce these protections.

In the E

U, ENISA supports cybersecurity and resilience measures for critical infrastructure, including subsea cables.

Operational and Technical Measures

Cable Protection Zones (CPZs): Operators establish CPZs to restrict anchoring, dredging, or other activities that could damage cables. These zones are charted and communicated to mariners to prevent accidental harm. Physical Protection: In shallow waters, cables are often buried 1–2 meters below the seabed using specialized plows or trenchers.

Where burial is not feasible, armored cables or rock placement provide mechanical protection. Monitoring and Maintenance: Real-time monitoring systems track signal integrity and integrate with maritime tracking to detect approaching vessels. When faults occur, optical time-domain reflectometry (OTDR) is used to locate breaks, followed by specialized repair operations using cable ships and remotely operated vehicles (ROVs),.

Landing Station Security: Cable landing stations, where cables connect to terrestrial networks, are vulnerable to sabotage, espionage, or power disruptions. Security measures include restricted access, surveillance, and coordination with national security agencies.

Risk Management

Accidental Damage: Most cable damage results from fishing, shipping, or natural events like earthquakes or ice shifts. Operators mitigate these risks through careful routing, CPZs, and public awareness campaigns. Intentional Damage: Sabotage or malicious attacks are less common but increasingly recognized as threats.

International cooperation and national enforcement are critical, though current international law lacks a fully effective regime for holding perpetrators accountable in international waters.

Best Practices

Comply with UNCLOS and national laws regarding cable laying and protection. Establish and maintain CPZs and communicate them to maritime authorities. Use physical protection measures such as burial, armor, or rock placement.

Implement real-time monitoring and rapid repair protocols. Secure cable landing stations with physical and cybersecurity measures. Coordinate with public and private stakeholders to enhance resilience and response capabilities.

By combining legal compliance, operational safeguards, and international cooperation, communication optical cables can be effectively protected, ensuring the continuity of global digital communications and minimizing economic and security risks.