Drugs at sea: boarding, jurisdiction and the routes
On the high seas a vessel is subject to its flag state, and that single rule governs everything that follows. Another state that suspects a ship of trafficking may request the flag state's authorisation to board; the 1988 United Nations convention sets out the mechanism. Which country ends up prosecuting is decided by that exchange, often within hours.
How an interdiction works
| Situation | Rule | Consequence |
|---|---|---|
| Vessel in territorial waters | Coastal state jurisdiction | That state prosecutes |
| Flagged vessel on the high seas | Flag state jurisdiction | Boarding requires its authorisation |
| Request to the flag state | Under the 1988 convention | Frequently granted within hours |
| Stateless vessel | No flag protection | Any state may board |
| Vessel refusing to identify | Treated as potentially stateless | A frequent basis for boarding |
| Semi-submersibles and go-fasts | Usually unflagged | Boarded without authorisation |
The defence questions follow directly. Was authorisation given, by whom, and before or after the boarding? Was the vessel genuinely stateless, or was the claim of statelessness the product of a refusal to answer? And on what basis did the boarding state acquire jurisdiction to prosecute rather than transfer?
The routes, and why they matter to a case
- The Atlantic route, from South America towards the Iberian peninsula and West Africa, where the crews are frequently recruited far from the organisers.
- The Strait, fourteen kilometres of water under permanent surveillance, dealt with in the guide for Tarifa.
- The container flows into Rotterdam, Antwerp, Hamburg, Genoa and Valencia, which are a different kind of case entirely.
- The Balkan route, overland from the east, generating vehicle and freight cases along the corridor.
- Coastal deliveries by small craft, where ownership and hire of the vessel become the whole of the evidence.
The route matters because it shapes who is on board. Crews on the Atlantic route are typically recruited for a single voyage, paid a fraction of the value, and have no knowledge of the structure behind it — which is a real argument on role and on the association charge, not a plea for sympathy.
The crew's position
Everyone aboard is normally charged with the whole cargo, and the quantity drives the bracket. What separates the members of a crew is what they knew, what they were paid, whether they could have left, and what their function actually was.
Where a single voyage is charged as membership of an organisation, the step is contestable on the same grounds as everywhere: structure, shared purpose and stability, rather than participation in one shipment. That is set out in the guide on trafficking association charges.
After the landing
Detention follows the rules of the state that took the case, and for a crew arrested at sea the practical problem is acute: no address anywhere in that country, no ties, no documents. That is the profile on which custody is ordered, and the answer includes supervision enforced in the country of residence, described in the guide on pre-trial detention abroad.
Frequently asked questions
Can any country board a ship at sea?
On the high seas a vessel is subject to its flag state. Boarding by another state normally requires the flag state's authorisation, which the 1988 convention provides a mechanism for.
What if the vessel had no flag?
A stateless vessel has no flag protection and may be boarded. Whether it was genuinely stateless, or was treated as such after a refusal to answer, is contestable.
Is the whole crew charged with the whole cargo?
Usually yes, with the quantity driving the bracket. What separates crew members is knowledge, payment, function and whether they could have left.
Why am I being held when I live abroad?
Because a crew arrested at sea has no address or ties in that country. Supervision enforced in your country of residence is the answer that is almost never requested.
If a vessel has been boarded
The authorisation, the flag and the timing of the boarding are the first things to establish. First contact is free and covered by professional privilege, at any hour.