ArcNautical open maritime-sanctions data
Free, sourced, downloadable aggregate statistics on the sanctioned vessel fleet — computed by the same engine behind arcnautical.com/check, refreshed weekly. Every figure carries its source and "as of" date; every dataset ships a CSV and a provenance JSON.
OFAC SDN vessel records (screened subset)
Public-record dataset of 1,527 screened IMO-bearing vessel records that appeared on the OFAC SDN list as of 2026-09-16: flag, flag-transparency tier, sanctions program, and public GLEIF ownership-resolution stage. Public-source compilation (OFAC SDN + GLEIF); no owner names, no proprietary scoring.
Sanctioned fleet by flag transparency
Of 1,506 OFAC-designated vessels with a recorded flag, 47.2% fly a flag-of-convenience / shell-jurisdiction register and only 0.4% fly a flag from a transparent public-UBO register (data as of 2026-10-08).
Sanctioned fleet by sanctions regime
OFAC has designated 1,559 vessels across 7 sanctions regimes; the largest is Iran with 670 vessels (43%) — data as of 2026-10-08.
Flag of convenience by regime
Flag-of-convenience reliance varies sharply by sanctions program: 88.5% of the North Korea (DPRK)-program fleet flies a shell-jurisdiction flag versus 23.3% of the Venezuela-program fleet — across 1,506 OFAC-designated vessels with a recorded flag (data as of 2026-10-08).
Vetting-grade distribution
Across 2,205 screened vessels, 94.6% sit at vetting grade D–E (substandard or unacceptable) and 1.8% at grade A–B (acceptable). Data as of 2026-10-04.