Saint Vincent and the Grenadines v. Spain: M/V Louisa Case

The M/V Louisa case was an international maritime dispute between Saint Vincent and the Grenadines and the Kingdom of Spain, heard by the International Tribunal for the Law of the Sea as Case No. 18. Saint Vincent asked the Tribunal to order the release of a vessel flying its flag, the return of seized property, and reparations of more than $40 million. On May 28, 2013, ITLOS ruled by a vote of 19 to 2 that it lacked jurisdiction to hear the claim.¹

Why Spain Detained the Vessel

The Louisa was owned and operated by Sage Maritime Partners Ltd., an affiliate of Sage Maritime Scientific Research Inc., both registered in Texas. It arrived at Cádiz on August 20, 2004, ostensibly to conduct sonar surveys and seabed sampling under a permit issued by the Spanish Ministry of the Environment to a partner company, Tupet Sociedad de Pesquisa Marítima S.A.² Saint Vincent maintained that the work was legitimate scientific research aimed at locating oil and gas deposits.

The Sage–Tupet contract said something different. It referenced the possible discovery of “historical artefacts, sunken vessels or other lost items of value” and set out terms for dividing recovered items, including gold and silver coins, cannons, and jewelry.²

On February 1, 2006, Spanish authorities boarded and detained the Louisa at El Puerto de Santa María, where it had been docked since October 2004. The order came from the Court of Criminal Investigation No. 4 of Cádiz. During the search, authorities found undersea archaeological objects, a handgun, and five assault rifles classified as weapons of war.³ The vessel was seized as an instrument used in two alleged crimes: possession and depositing of weapons of war, and the continued crime of damaging Spanish historical patrimony.² A second vessel, the Gemini III, was detained the same day. It did not fly the Saint Vincent flag.

What Saint Vincent Asked the Tribunal to Do

Saint Vincent and the Grenadines filed proceedings on November 24, 2010, more than four years after the seizure.⁴ The application was brought under the United Nations Convention on the Law of the Sea. It sought the release of both vessels, the return of seized property, and reparations exceeding $40 million.⁵

Saint Vincent alleged that Spain had violated several UNCLOS provisions: Article 73 (enforcement of coastal state fisheries laws), Article 87 (freedom of the high seas), Article 226 (investigation of foreign vessels), Article 227 (non-discrimination against foreign vessels), Article 245 (marine scientific research in territorial seas), and Articles 300, 303, and 304, which address good faith, archaeological objects at sea, and liability for damage.³ Article 300 was also invoked to raise concerns about the treatment of crew members during and after the detention.

Alongside the main application, Saint Vincent requested provisional measures under Article 290, asking the Tribunal to order the vessel’s immediate release. After hearings on December 10 and 11, 2010, the Tribunal issued its order on December 23, 2010. It found prima facie jurisdiction but held, by 17 votes to 4, that the circumstances did not require provisional measures.⁵ That preliminary finding on jurisdiction did not survive the full proceedings.

Why ITLOS Ruled It Had No Jurisdiction

Throughout the merits phase, Spain argued that ITLOS had no jurisdiction because the detention arose from domestic criminal proceedings, not from any dispute governed by UNCLOS. The Tribunal agreed. In its May 28, 2013 judgment, it concluded that no dispute concerning the interpretation or application of UNCLOS existed between the parties when the case was filed. It therefore lacked jurisdiction ratione materiae over the subject matter itself.

The UNCLOS provisions Saint Vincent invoked did not fit the facts. The Louisa had been detained in a Spanish port in connection with criminal charges involving weapons of war and damage to cultural heritage, not for conduct covered by Articles 73, 87, 226, 227, or 245.¹ The case, in the Tribunal’s view, was fundamentally about Spain’s enforcement of its own criminal law.

The Gemini III fell outside the case for a separate reason. It did not fly the flag of Saint Vincent and the Grenadines and was not covered by that country’s declaration under Article 287 of UNCLOS.¹

On the human rights allegations, the Tribunal refused to let Article 300 pull mistreatment claims into the dispute. The original application, it said, could not be “transformed in the course of proceedings into another dispute which is different in character.”¹ It noted in general terms that states must fulfill their obligations under international human rights law and that due process must apply in all circumstances. The Tribunal unanimously decided that each party would bear its own costs.

What the Case Established

The judgment set a clear boundary on ITLOS jurisdiction. When a flag state’s vessel is detained as part of a coastal state’s criminal proceedings, and the underlying facts do not engage the maritime rules UNCLOS governs, the Tribunal will not intervene simply because a vessel and a foreign state are involved. The distance between the December 2010 finding of prima facie jurisdiction and the 19-to-2 rejection in May 2013 shows how a preliminary assessment can shift once full argument is heard.

The case also confirmed a point about Article 287 declarations: ITLOS may accept limitations on its own jurisdiction where a state has expressly written those limitations into its declaration.⁵ With the international proceedings ended on jurisdictional grounds, the Spanish criminal case against the vessel’s operators continued on its own track.

1
ITLOS. M/V Louisa Case, Press Release
2
ITLOS. M/V Louisa Case, Judgment
3
Jus Mundi. M/V Louisa Case, Judgment
4
ITLOS. Case No. 18, M/V Louisa
5
Spanish Yearbook of International Law. M/V Louisa Case Analysis