Sanctioned vessels (red/amber): Live global tracking of 900+ shadow-fleet tankers designated by OFAC, EU, UK, and Canada. Coverage is worldwide wherever AIS is broadcast.
Active tankers (cyan): Real-time AIS for the Baltic Sea via Digitraffic Finland (5,000+ vessels). This is the densest free public AIS feed available without authentication.
Why North America looks empty: Free public AIS for US/Caribbean waters requires a paid API. Sanctioned shadow-fleet vessels also actively avoid these waters due to enforcement.