HMS Medway’s Chilean Port Call Sparks Argentine Diplomatic Protest

The Royal Navy offshore patrol vessel HMS Medway sailed from the Falkland Islands along the Argentine coast, passing Santa Cruz and Tierra del Fuego before entering the Strait of Magellan and docking at the Chilean port of Punta Arenas. The ship berthed at the Prat pier on 5 July 2024 and remained until 8 July. Argentina’s foreign minister, Pablo Quirno, lodged a formal note of protest on 13 July 2024, describing the movement as “unconsulted and illegal” and alleging a breach of confidence-building measures dating from the early 1990s.

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HMS Medway has been the United Kingdom’s permanently-deployed Falkland Islands guard ship since January 2026, succeeding HMS Forth. Its routine duties include fishery protection, sovereignty patrols and maritime security. The vessel completed an 8,000-mile humanitarian mission to Tristan da Cunha earlier in the month, delivering medical aid after a suspected hantavirus outbreak.

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The transit occurred hours after Argentina’s national football team defeated England in the World Cup semi-final, a moment that amplified nationalist rhetoric. Vice-President Victoria Villarruel had previously labeled England “usurping pirates,” and provincial lawmakers in Tierra del Fuego called the passage a provocation. Simultaneously, Argentina’s president, Javier Milei, is scheduled to visit London later in July, prompting a measured diplomatic stance despite pressure from hard-line elements.

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• Pablo Quirno, Argentine Foreign Minister: lodged a protest, calling the transit “unconsulted and illegal” and a “military incursion” into Argentine jurisdiction.

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• Chilean Navy: described the visit as a logistical call within existing bilateral cooperation on Antarctic matters.

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• UK Foreign Office: sent a delegation to tour the ASMAR shipyard in Chile and confirmed that the British embassy had notified the Argentine foreign ministry, defence ministry and joint chiefs of staff before departure.

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• British Embassy in Buenos Aires: reported that Argentine officials had initially tracked the vessel and communicated through established bilateral mechanisms, indicating no immediate breach.

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Provincial politicians in Tierra del Fuego and Vice-President Villarruel condemned the transit as a deliberate provocation, invoking historic claims over the islands. Their statements linked the ship’s movement to broader Argentine sovereignty claims and to the “integrated naval base” under construction at Ushuaia, which they portray as evidence of a growing Argentine-US strategic footprint in the South Atlantic.

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• Armament: a single 30 mm gun; potential future upgrades with uncrewed systems.

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• Deployment: permanently stationed in the Falklands since January 2026; replaced HMS Forth, now in refit on Teesside.

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• Transit route: Falklands -> Argentine coast (Santa Cruz, Tierra del Fuego) -> Strait of Magellan -> Punta Arenas (Chile).

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• Legal framework: the 1881 Chile-Argentina treaty (reaffirmed 1984) and UNCLOS guarantee the right of innocent passage for warships through the Strait of Magellan and adjacent waters.

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Argentina’s foreign ministry initially indicated that the vessel’s passage was tracked and communicated through normal channels, suggesting no breach. The later protest reframed the same transit as illegal, highlighting a shift from procedural acknowledgment to political escalation. No independent legal assessment has been published to resolve the dispute over whether the ship’s route violated confidence-building measures.

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• “unconsulted and illegal” — Pablo Quirno, Argentine Foreign Minister

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• “usurping pirates” — Victoria Villarruel, Argentine Vice-President

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• “las Malvinas son argentinas” — Argentine football squad banner after World Cup semi-final

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President Milei’s upcoming London visit is expected to include discussions on the Falklands dispute, while the United Kingdom is likely to reaffirm its commitment to the existing defence posture on the islands, including the RAF Typhoon detachment at Mount Pleasant and the ground-based air-defence missile battery.

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