India Lodges Strong Protest After US Navy Strikes Tanker MT Settebello, Killing Three Indian Mariners
A US Navy strike targeted the Palau-flagged chemical and oil products tanker MT Settebello in the Gulf of Oman, killing three Indian crew members — deck cadet Aditya Sharma (Himachal Pradesh), engine fitter Shivanand Chaurasiya, and chief engineer Patnala Suresh.
US Central Command (CENTCOM) stated it fired precision munitions into the vessel's engine room after the crew allegedly failed to comply with directions from American naval forces, asserting the ship was attempting to breach the naval blockade on Iranian ports with a shipment of Iranian oil.
Of the 28 crew aboard, 24 were Indian nationals; 21 were rescued, three confirmed dead, and the remainder included Pakistani, Ukrainian, and Russian crew members.
India's Ministry of External Affairs (MEA) summoned the US Chargé d'Affaires (CdA) Jason Meeks — the deputy chief of mission officiating in the absence of the US Ambassador — twice within 48 hours, condemning the attacks in full public view with media permitted to film the diplomat's arrival at the MEA.
The External Affairs Minister spoke directly to the US Secretary of State, reiterating India's strong protest and stating that "lethal actions against commercial shipping are not justified."
India called on US forces to take all necessary measures to prevent loss of civilian life and stated that the use of lethal and deadly force against civilian shipping is unacceptable.
UNCLOS and Freedom of Navigation
The United Nations Convention on the Law of the Sea (UNCLOS), adopted in 1982 and entering into force in 1994, is the primary international legal framework governing maritime rights and duties. It establishes territorial waters (12 nautical miles), the Exclusive Economic Zone (200 nautical miles), and the high seas regime. Under UNCLOS, Article 87, the high seas are open to all states for navigation, and merchant vessels generally enjoy freedom of navigation. UNCLOS does not contain detailed rules for naval warfare; those are governed separately by customary international law and instruments such as the San Remo Manual.
India's protest invokes the international legal principle that commercial vessels on the high seas enjoy protection from attack under both UNCLOS freedom of navigation norms and the laws of armed conflict, and that ordinary commercial carriage of energy cargo does not constitute a military objective.
Laws of Armed Conflict at Sea: San Remo Manual (1994)
The San Remo Manual on International Law Applicable to Armed Conflicts at Sea, adopted in June 1994 by the International Institute of Humanitarian Law, is the most comprehensive modern codification of naval warfare law. Though not a binding treaty, it reflects customary international law. It establishes that merchant vessels are presumed to be civilian objects and may not be targeted unless they qualify as military objectives under the principles derived from Additional Protocol I (1977) to the Geneva Conventions.
India's position — that "lethal force against civilian shipping is unacceptable" — directly invokes the San Remo Manual standard that a commercial tanker transporting energy cargo is not automatically a legitimate military target, even if alleged to be breaching a blockade.
Diplomatic Protocol: Summoning an Ambassador / Chargé d'Affaires
Summoning a foreign diplomat to the Ministry of External Affairs is a formal act of diplomatic protest under the Vienna Convention on Diplomatic Relations (1961). It signals a government's serious displeasure and creates an official record. The diplomat summoned may be the ambassador, deputy chief of mission, or Chargé d'Affaires (CdA), who acts as the head of mission when the ambassador is absent.
India summoned the US CdA twice within 48 hours — a notably rapid and publicly visible escalation — using the diplomatic summons to register a formal legal and political protest while stopping short of more severe measures such as expulsion.
India-US Strategic Partnership and its Stress Points
India and the United States are Major Defence Partners (since 2016) and have signed three foundational defence agreements: LEMOA (Logistics Exchange Memorandum of Agreement, 2016), COMCASA (Communications Compatibility and Security Agreement, 2018), and BECA (Basic Exchange and Cooperation Agreement, 2020). These enable interoperability and intelligence sharing. However, divergences arise on third-country conflicts — India has traditionally maintained strategic autonomy and does not align with Western-led naval operations in the Gulf.
This incident creates a rare and significant bilateral tension: India is protesting the actions of its Major Defence Partner, whose blockade operations directly threaten Indian maritime workers and India's energy supply chain, revealing the limits of the strategic partnership when core Indian interests are at stake.
Gulf of Oman: Strategic Geography
The Gulf of Oman is a body of water connecting the Arabian Sea to the Strait of Hormuz, bordered by Oman, Iran, and Pakistan. It is one of the world's most critical maritime corridors. The Strait of Hormuz — at its narrowest point only 29 nautical miles wide, with two-mile navigable channels — is the world's most important oil chokepoint: approximately 15–20 million barrels per day pass through it, representing roughly 25–34% of global seaborne oil trade.
MT Settebello was struck in the Gulf of Oman — international waters — while carrying cargo allegedly in breach of a US-declared blockade on Iranian ports. India's strong reaction reflects the direct economic and human stakes it has in the freedom of navigation through this corridor.
- MT Settebello: Palau-flagged chemical and oil products tanker; crew of 28 at the time of the attack.
- Indian casualties: 3 confirmed dead (Aditya Sharma — Himachal Pradesh, Shivanand Chaurasiya, Patnala Suresh); 21 rescued; 24 Indians total aboard.
- US justification: CENTCOM stated the vessel was attempting to breach the naval blockade on Iranian ports with Iranian oil.
- India's position: "Lethal actions against commercial shipping not justified"; "use of lethal and deadly force against civilian shipping is unacceptable."
- Diplomatic action: US CdA Jason Meeks summoned twice by MEA within 48 hours; External Affairs Minister spoke directly with the US Secretary of State.
- Strait of Hormuz: ~15–20 million barrels/day of oil transit; ~25–34% of global seaborne oil trade.
- San Remo Manual (1994): Non-binding codification of the law of naval warfare; establishes that merchant ships are civilian objects unless they qualify as military objectives.
- Vienna Convention on Diplomatic Relations (1961): Governs the protocol of summoning ambassadors and diplomatic protest.
- India-US foundational defence agreements: LEMOA (2016), COMCASA (2018), BECA (2020).