Every vessel that moves cargo through the world's shipping lanes carries a permanent identity: its IMO number. Unlike a vessel's name, its flag, or its MMSI, the IMO number survives every sale, every flag change, and every rebranding. It is the anchor point for any serious maritime ownership investigation, and it is freely searchable on Equasis, the IMO-endorsed registry that maritime investigators rely on more than any other single source. Reading an Equasis record correctly is a skill. The difference between a registered owner and an operational ship manager is not labelled — it has to be understood.
Use ship ownership research when establishing who controls a vessel of investigative interest, verifying the corporate chain behind a flag state registration, or cross-referencing operator identity against sanctions lists. A registered owner in a secrecy jurisdiction and a ship manager in a different one are not, individually, evidence of wrongdoing. The pattern of changes, cross-referenced against known evasion structures, is what carries investigative weight.
MAR-002 sets out the methodology for reading Equasis records, tracing ownership structures, and cross-referencing flag state and sanctions data to evidentiary standard.
Five tooling sources, four OPSEC requirements, seven workflow steps, five false-positive patterns, five chain-of-custody requirements, six key queries.
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01
Required Tools
Five registries covering IMO, flag state, and sanctions data.
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02
OPSEC
Corporate structure risks and query attribution in registry research.
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03
Workflow
Seven-step sequence from IMO lookup to beneficial ownership chain.
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04
False Positives
Five structural patterns that resemble evasion but are routine.
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05
Chain of Custody
Five requirements for preserving registry records and ownership snapshots.
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06
Key Queries
Six queries across Equasis, ITU MARS, and sanctions databases.
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