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.
Sanctioned fleet by flag transparency
Of 1,464 OFAC-designated vessels with a recorded flag, 34.4% fly a flag-of-convenience / shell-jurisdiction register and only 2.3% fly a flag from a transparent public-UBO register (data as of 2026-06-11).
Sanctioned fleet by sanctions regime
OFAC has designated 1,499 vessels across 7 sanctions regimes; the largest is Iran with 616 vessels (41.1%) — data as of 2026-06-11.
Ownership opacity of the screened fleet
Across 1,862 screened vessels, 67.7% have no public GLEIF beneficial-ownership record and 74.4% carry a medium-or-higher ownership-opacity band — data as of 2026-06-16.
Vetting-grade distribution
Across 1,862 screened vessels, 63.8% sit at vetting grade D–E (elevated-to-critical risk) and 31.5% at grade A–B (low risk) — data as of 2026-06-16.