🛰️ Taiwan Gray Zone & Submarine Cable Monitor

Gray Zone Monitor Dark Vessels Statistics Trail Animation Articles
More ▾
Network Traffic SAR×AIS Match CN Fishing STS Transfer Identity Research About
中
KNOWLEDGE BASE · TAIWAN GRAY ZONE MONITOR

In-Depth Articles

From submarine cable fundamentals to Taiwan's security challenges — six articles on the invisible underwater war

6 Series Articles
63 Min. Reading
1 Research Report
FILTER
ARTICLE SERIES
WEEKLY REPORT
High-Risk Vessel Weekly Report
Loitering hotspot map × per-vessel aggregates × CSV/JSON
Auto-generated weekly aggregates of high-risk vessels (score ≥8): an interactive map of low-speed loitering hotspots near submarine cables, type and flag breakdowns, port calls and time at sea, plus monthly rollups — with raw CSV/JSON downloads.
Reports Interactive Map Data Download Updated Mondays 🔄
EXPLAINER
What Is a Dark Vessel?
Detecting Dark Vessels Near Taiwan
Switching off AIS doesn't make a ship disappear. How SAR satellites find dark vessels, the role of Global Fishing Watch, why it matters around Taiwan, and how this site reads them.
Dark Vessel SAR Basics 8 min ⏱
EXPLAINER
What Is a Ship-to-Ship Transfer?
Detecting STS Rendezvous at Sea
Two ships lying alongside to move cargo at sea — when is it lawful pair-trawling, when is it suspicious? How STS is detected, why it ties to sanctions evasion and the gray zone, and how this site reads it.
STS STS Basics 8 min ⏱
GLOSSARY
Gray-Zone Glossary
Bilingual Term Definitions
Bilingual definitions of 22 terms — gray-zone operations, dark vessels, AIS spoofing, MMSI, STS, SAR, flags of convenience, territorial baselines — each with a citable anchor.
Glossary Reference Basics Reference ⏱
EXPLAINER
Taiwan's Maritime Zones
Baseline, Territorial Sea, Contiguous Zone & EEZ
What the territorial baseline, 12 nm territorial sea, 24 nm contiguous zone, and 200 nm EEZ mean, how this site's zone layers are used, and legal delimitation vs a risk-analysis aid.
Maritime Zones UNCLOS Reference 7 min ⏱
PILLAR
What Is Maritime Gray-Zone Activity?
Tactics Around Taiwan
Confrontation below the threshold: dark vessels, AIS spoofing, STS, shadow fleets, cable threats — one page to understand the tactics around Taiwan and how OSINT tracks them.
Gray Zone Overview Basics 9 min ⏱
EXPLAINER
What Is a Shadow Fleet?
Sanctions Evasion, STS & Flags of Convenience
A group of vessels that hide ownership to evade sanctions: flags of convenience, going dark and AIS spoofing, STS transfers, shell companies. How shadow fleets operate and why they fit submarine-cable gray-zone threats.
Shadow Fleet Sanctions Evasion Gray Zone 8 min ⏱
EXPLAINER
What Are Maritime Sanctions?
OFAC / EU / UN Lists, Shadow Fleet & IMO Matching
Who sanctions ships, how the lists designate vessels by IMO, how sanctioned tankers evade via flag hopping and fake IMOs, and why OFAC/EU/UANI-listed tankers appear in Taiwan's waters.
Maritime Sanctions Shadow Fleet Gray Zone 8 min ⏱
EXPLAINER
What Is AIS Spoofing?
Detecting Fake Positions & Identity Fraud
A ship can broadcast a fake position or speed, or borrow another vessel's MMSI, name, and IMO. How AIS spoofing is detected (impossible speed, box/circle tracks, registry mismatch) and why it matters for cable security.
AIS Spoofing Detection Basics 8 min ⏱
ARTICLE 01
What Are Submarine Cables?
The World's Invisible Backbone
The message you just sent is traveling at the speed of light, 4,000 meters beneath the ocean. From the 1850 telegraph cable to fiber carrying $10 trillion in daily transactions — civilization's invisible backbone.
Basics Submarine Cable 8 min ⏱
ARTICLE 02
What Is AIS?
Ship Tracking & Dark Vessels
Every large vessel must broadcast its position — unless someone switches it off. Why are "dark vessels" a top concern for cable security? How do satellites find them when they go silent?
AIS Dark Vessel SAR 10 min ⏱
ARTICLE 03
Taiwan's Cable Situation
14 International Cables, Growing Fragility
Feb 2023, Matsu: both cables severed, 13,000 people offline for nearly 2 months. Taiwan represents just 0.13% of ocean area but accounts for ~10% of global cable incidents.
Taiwan Cables Matsu Infrastructure 9 min ⏱
ARTICLE 04
Threats to Submarine Cables
Natural Disasters to Gray Zone Warfare
100–200 cable damage incidents globally each year. 41% fishing, 16% anchors, 9% "third-party activities" — but near Taiwan, that last category is growing alarmingly fast.
Threat Analysis Shadow Fleet Gray Zone 11 min ⏱
ARTICLE 05
Taiwan's Enforcement Framework
Where Does the Law End?
January 2025: the Coast Guard arrived. Xing Shun 39 had already sailed away. The Telecom Act, UNCLOS flag-state jurisdiction, the 1884 Convention — just how far can Taiwan's arm reach?
Enforcement UNCLOS Coast Guard 12 min ⏱
ARTICLE 06
Our Methodology
Finding Needles in the Maritime Haystack
Thousands of vessels transit Taiwan's waters daily. How do we find the ones worth watching? Data sources, 8 threat-scoring criteria, AIS spoofing detection, automated pipeline.
Methodology CSIS Open Source 13 min ⏱
LAW OF THE SEA
LAW OF THE SEA 01
What Are "Maritime Rights"?
Sovereignty, Sovereign Rights & Jurisdiction
"Maritime rights" under Taiwan's Ocean Basic Act is not one right but three tiers — sovereignty, sovereign rights, jurisdiction — mapping onto national security, law-and-order, and maritime safety. Cable protection sits inside this structure.
Law of the Sea UNCLOS Legal Analysis 8 min ⏱
LAW OF THE SEA 02
Cables Under International Law
From the 1884 Convention to UNCLOS
The 1884 Convention has the most teeth but few parties; UNCLOS Art. 113 grants only prescriptive, not enforcement, jurisdiction. With exclusive flag-state jurisdiction, the victim state often has "a law but no power to touch the ship."
Law of the Sea International Law UNCLOS 11 min ⏱
LAW OF THE SEA 03
Who Can Board and Enforce?
Hot Pursuit, Right of Visit & Universal Jurisdiction
Can the Coast Guard board a foreign ship that cut a cable off Taiwan? The right of visit, hot pursuit, coastal-state powers, and Art. 72 each have strict thresholds. Extending universal jurisdiction to cables is still a proposal.
Law of the Sea Enforcement Jurisdiction 12 min ⏱
LAW OF THE SEA 04
Taiwan's Cable Infrastructure
4 Landing Stations & 12 Cable Systems
Toucheng, Tamsui, Bali, and Fangshan carry ~12 landing international cables; the Kinmen–Xiamen and Tamsui–Fuzhou cross-strait cables are sensitive. Most fragile are the outer islands: Matsu has 2, Kinmen just 1+1.
Law of the Sea Taiwan Cables Infrastructure 9 min ⏱
LAW OF THE SEA 05
The Global Cable Industry
Who Owns It, Why It Breaks, How It's Repaired
400+ cables and 1.1M km worldwide; ownership is shifting from telecom consortia to OTT private cables (Google, Meta). Over 70% of faults are human (fishing + anchors), and repair is limited by ~60 cable ships.
Law of the Sea Cable Industry Infrastructure 11 min ⏱
RESEARCH REPORT
RESEARCH REPORT
The Invisible War: PRC Shadow Fleet Attacks on Taiwan's Cables
Submarine Cable Legal Analysis — National Defense Journal
National Defense Journal academic research. Full analysis of PRC civil-exploitation lawfare, UNCLOS legal gaps, the 1884 Convention, and policy recommendations for Taiwan. A comprehensive vulnerability assessment.
Research UNCLOS Legal Analysis 30 min ⏱
Start Reading Article 01 → ← Back to Dashboard