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The Signal & Shadow OSINT Reference Card library — practical tradecraft built to professional standard.

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Port state control and vessel inspection records

OSINT Cards

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Apr 8, 2026

Port state control and vessel inspection records

Pull a vessel's full inspection history from Equasis, separate detentions from deficiencies, and weight flag state rankings.

Derek Bowler
Derek Bowler
Identifying dark vessel behaviour and AIS spoofing

OSINT Cards

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Apr 7, 2026

Identifying dark vessel behaviour and AIS spoofing

The eight-step workflow for classifying AIS gaps, testing for spoofing, and documenting findings to evidentiary standard

Derek Bowler
Derek Bowler
Ship ownership and flag state registries

OSINT Cards

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Apr 6, 2026

Ship ownership and flag state registries

Read an Equasis record the way an experienced maritime investigator does, and trace the corporate chain behind any commercial vessel

Derek Bowler
Derek Bowler
AIS and MMSI vessel tracking

OSINT Cards

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Apr 5, 2026

AIS and MMSI vessel tracking

Query MMSI across MarineTraffic and VesselFinder, confirm ownership via Equasis, and document AIS gaps to evidentiary standard

Derek Bowler
Derek Bowler
Neutral language cheatsheet

OSINT Cards

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Apr 1, 2026

Neutral language cheatsheet

Apply a substitution table, confidence tiers and attribution rules to every draft before it goes out. Standards hold up in legal and editorial review

Derek Bowler
Derek Bowler
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