Skip to content
TOOL

MarineTraffic: How Analysts Track Ships in Conflict Zones

/ Intelligence Tools
Status Active
Access On-site
← All Tools
Share X in

WarBrief Live | October 21, 2026 | Intelligence Tool Profile

MarineTraffic is the world’s most widely used open vessel-tracking platform: a live map of commercial shipping built from one of the largest networks of shore AIS receivers and satellite AIS. Journalists, sanctions researchers, and maritime analysts use it to watch ships, port traffic, and chokepoints such as the Strait of Hormuz and the Black Sea.

At a glance

  • What: AIS ship-tracking platform — live map, vessel histories, port data
  • Best for: dark-event detection, port-call history, vessel identity checks, chokepoint monitoring
  • Cost: free basic tier; paid satellite-AIS plans from ~$5–$15/month; enterprise by quote
  • Catch: AIS is trust-based — spoofed and dark vessels need satellite imagery or commercial data to resolve

What MarineTraffic does

Owned by Kpler since March 2023, it reports around 8.5 million users, with offices in the UK, Greece, and Singapore.

Each vessel page shows current and recent positions, ship particulars, port arrivals and departures, historical tracks, and a community photo archive. Paid tiers add fleet lists, alerts, port congestion data, and API access.

How analysts use it in conflict zones

MarineTraffic is typically the starting point, not the conclusion, of maritime OSINT. Analysts monitoring the Strait of Hormuz — through which roughly 20 percent of global oil supply moves — use it to verify tanker traffic during strikes, seizures, or closures, and in the Black Sea to reconstruct which vessels were where when a strike occurred.

The most common intelligence use is dark-event detection. When a tanker goes dark — switching off its transponder before entering sanctioned waters, then reappearing days later — the gap in the AIS track is the lead. Analysts combine gaps with port-call history, draught changes, and satellite imagery to identify shadow-fleet activity: industry estimates put more than 1,300 vessels, roughly 20 percent of tanker capacity, in these opaque trades. Watch-list techniques include AIS spoofing (false positions, common in the Persian Gulf), identity laundering (name and flag changes), and ship-to-ship transfers in international waters.

A third workflow is identity confirmation: matching community photos against the broadcast identity and checking ownership histories — though registry data can lag sales and reflagging by months, so analysts cross-reference the IMO’s GISIS database or flag-state registries. Our sanctions profile on tracking Russia’s shadow fleet shows how these techniques feed enforcement work.

Access and pricing

The free tier gives a live terrestrial-AIS map and basic vessel information — enough for many OSINT workflows — plus a free mobile app with optional in-app purchases. Paid plans unlock satellite AIS (coverage far offshore), deeper track history, alerts, and ad removal.

Publicly listed prices checked in October 2026 vary by region: a Basic tier runs roughly £10 per user per month (~$5–$15/month equivalent), with satellite-AIS tiers around $15/month offering multi-year histories and port data. Full enterprise access — API feeds, bulk data, fleet management, dark-vessel analytics — is quote-based through Kpler. Check the provider’s own plans page before purchasing.

Limitations analysts must remember

  • Spoofing: a ship broadcasts whatever its crew types in — AIS positions are routinely contradicted by satellite imagery.
  • Going dark: a switched-off transponder produces a gap, not an explanation; what happened inside needs satellite imagery, usually at enterprise cost.
  • Coverage gaps: terrestrial AIS is line-of-sight — inland waters, some coasts, and small craft can vanish even when transmitting.
  • Stale registries: ownership and flag data lag real sales by months.
  • Satellite delay: orbital AIS positions can lag minutes to hours.

For sanctions-grade investigations, analysts pair MarineTraffic with dedicated dark-vessel services, satellite imagery, and official records. Browse our intelligence tools index for more OSINT platform profiles.

Frequently asked questions

Is MarineTraffic free to use?
The free tier covers the live terrestrial-AIS map and basic vessel details. Satellite AIS, deep history, alerts, and API access need paid plans.

Can MarineTraffic track dark ships?
Partially. It shows where a vessel went dark and where it reappeared — often the crucial lead. What happened inside the gap needs satellite imagery or commercial dark-vessel analytics.

How do analysts verify a vessel’s identity?
By cross-checking the broadcast identity against the IMO number, community photos, port-call history, and official records such as the IMO’s GISIS database — treating ownership fields as potentially months out of date.

Sources

Related Intelligence Tools

View archive