STK-1016 (IMO 8521880) has 4 potential, low-confidence sanctions matches — name-only, with no IMO/MMSI confirmation in the source records — as of 2026-07-12. This is an unconfirmed flag, not a designation; confirm against the primary list(s) (OpenSanctions) before treating as sanctioned. Check the current status for IMO 8521880 at https://arcnautical.com/check/8521880.
STK-1016 is a screened vessel with 4 active sanctions designations (OpenSanctions) · ownership opacity 40/100.
Key verifiable facts
Sanctions listingListed on OpenSanctions, program ua_war_sanctionsSource: OpenSanctions · as of 2026-07-12
Sanctions screeningScreened against OFAC SDN, EU Consolidated, UN Security Council, UK HMT/OFSI, and OpenSanctions vessel lists — 1 potential name match — IMO not confirmed in source; manual verification required.Source: ArcNautical sanctions screening · as of 2026-07-12
STK-1016 matched 4 sanctions records. 1 of these match on exact IMO or MMSI — the highest-confidence form of sanctions identification.
Source list
Programs
Match type
Confidence
OpenSanctions
ua_war_sanctions
Exact IMO
100%
OpenSanctions
ua_war_sanctions
Name fuzzy
94%
OpenSanctions
ua_war_sanctions
Name fuzzy
89%
OpenSanctions
ua_war_sanctions
Name fuzzy
89%
Corporate Ownership & Opacity
40/100Moderate opacity
Registered entity
Not in GLEIF registry
LEI registration is voluntary for non-financial maritime entities; absence is itself a signal.
+35No GLEIF/LEI record (LEI registration voluntary for non-financial maritime entities)
+5Flag jurisdiction ? — Unclassified
Recent Port Calls (AIS)
No AIS port-call data captured for STK-1016 in the last 180 days. Sanctioned vessels frequently transmit AIS irregularly or disable transponders entirely — this absence is itself a vetting signal documented in the OFAC, EU, and IMO sanctions evasion advisories.
Flag State Risk Analysis
The flag state for STK-1016 is not currently recorded in public sanctions databases. Flag state identification is a critical element of maritime due diligence, as it determines the regulatory framework governing the vessel's operations, the port state control inspection regime it faces, and the extent to which it may be subject to sanctions enforcement by various jurisdictions. ArcNautical's live screening tool checks the vessel against OFAC SDN, EU, and UN sanctions databases regardless of flag state availability.
Vessels with unknown or undisclosed flag states warrant additional scrutiny in compliance assessments. The absence of flag state data may indicate recent reflagging, administrative gaps in registry reporting, or deliberate obfuscation. ArcNautical's ownership opacity scoring evaluates corporate transparency through GLEIF registry data and beneficial ownership chain analysis, providing an additional layer of risk assessment independent of flag state information.
Live Sanctions Screening
Sanctions
AMBER
1 potential name match — IMO not confirmed in source; manual verification required.
Ownership Opacity
40
MEDIUM OPACITY
0 = transparent · 100 = opaque
Vetting Grade
C
Score: 56/100
marginal
Weekly snapshot · as of 2026-07-12
As of 2026-07-12
Request the reviewed intelligence dossier
Ownership chain details, sanctions match evidence, PSC detention records, and PDF report after manual review for STK-1016.
Frequently Asked Questions
Is STK-1016 (IMO 8521880) sanctioned?
STK-1016 has potential name-only matches in sanctions-related databases (Ukraine War Sanctions) — not IMO/MMSI-confirmed, not a designation; manual verification required. Use the live screening tool above for the most current status.
What is IMO number 8521880?
IMO 8521880 is the International Maritime Organization identification number permanently assigned to STK-1016. IMO numbers are unique 7-digit identifiers that remain with a vessel throughout its lifetime, regardless of changes in name, flag, or ownership. They are the primary identifier used in sanctions screening, port state control, and maritime compliance.
How is the vessel vetting grade calculated?
ArcNautical's vetting grade (A through E) is a composite score based on five weighted factors: PSC detention history (30%), flag state performance (25%), ownership transparency (20%), vessel age (15%), and inspection recency (10%). Data is sourced from Paris MOU, Tokyo MOU, GLEIF corporate registry, and OFAC/EU/UN sanctions databases.