What is the common examiner trap about Intl. Relations in UPSC exams?

They will confuse the governing laws: asking which law applies in peacetime (UNCLOS) vs. wartime (LOAC/San Remo Manual). They may also swap 'ceasefire' with 'armistice' or 'peace treaty', where the latter legally ends a war.

What should UPSC aspirants remember about Intl. Relations for Prelims?

1. Target this Data: April 19, 2026 (Seizure Date) & April 8, 2026 (Ceasefire Date). 2. Target this Nodal Body: US Central Command (CENTCOM) - the military command involved. 3. Target this Legal Point: San Remo Manual (1994) as the key code for naval warfare.

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News 14 of 25

US Seizes Iran Ship Touska in Gulf of Oman Under San Remo Manual and UNCLOS, Tests Ceasefire Legality Under LOAC

Q: Which US military command was responsible for the warnings and operation leading to the seizure of the Iranian ship Touska?

US Central Command (CENTCOM), The article explicitly states that warnings were issued by US Central Command (CENTCOM) for six hours prior to the attack and seizure of the vessel Touska.

Q: Consider the following statements regarding the legal frameworks discussed in the news: 1. The United Nations Convention on the Law of the Sea (UNCLOS) is the primary treaty governing maritime activities during peacetime. 2. The San Remo Manual is an international code that governs the conduct of naval warfare and is part of International Humanitarian Law. 3. Under the Law of Armed Conflict (LOAC), a formal declaration of war is a mandatory prerequisite for an 'international armed conflict' to exist. Which of the statements given above is/are correct?

Both 1 and 2, Statement 1 is correct as the article states UNCLOS regulates peacetime activities. Statement 2 is correct as the article describes the San Remo Manual as the universally recognised code governing naval warfare. Statement 3 is incorrect because the article specifies that LOAC says an armed conflict exists 'whenever there is a resort to armed force between States, regardless of whether a formal declaration of war has been made'.

Q: According to the article, on which date did the temporary ceasefire between the US-Israeli alliance and Iran take effect?

April 8, 2026, The article clearly states: 'A temporary ceasefire took effect on April 8'. February 28 is the war start date, April 13 is the blockade start date, and April 19 is the seizure date.

Intl. Relations Security & Defence PolitySUPPORT

Target:UPSC GS-IIMPSCSSC GATeachingPrelims HighMains HighStatic GK Link

21 Apr 2026

~2 min

Source: Indian Express

Key Data:April 19, 2026April 8, 2026April 13, 2026February 28, 2026

Bodies:CENTCOM

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~2 min · Quick mode

What This Article Covers

1.The US seized the Iran-flagged vessel Touska on April 19, 2026, enforcing a blockade imposed on April 13, 2026, following a ceasefire on April 8, 2026.

2.The legal status of the action depends on whether the ceasefire is considered a pause (LOAC applies) or an end to hostilities (UNCLOS applies).

3.Key legal instruments involved are the UNCLOS (peacetime), the San Remo Manual (naval warfare), and the concept of Prize Law, testing the applicability of International Humanitarian Law.

The Big Picture

Prelims · HighMains · High

A US naval blockade and ship seizure in the Gulf of Oman tests the legal distinction between wartime and peacetime under international law. The legality hinges on whether an April 8 ceasefire terminated the conflict, shifting the applicable legal framework from the Law of Armed Conflict (LOAC) to the UN Convention on the Law of the Sea (UNCLOS). This case study is crucial for understanding maritime law, naval blockades, and the legal status of ceasefires.

Exam Lens

Quick Exam Facts From News

Date of US SeizureApril 19, 2026

Ceasefire DateApril 8, 2026

US Blockade StartApril 13, 2026

Key Legal ManualSan Remo Manual (1994)

1-Minute Revision

›Date of US Seizure: April 19, 2026
›Ceasefire Date: April 8, 2026
›Target this Data: April 19, 2026 (Seizure Date) & April 8, 2026 (Ceasefire Date).
›Target this Nodal Body: US Central Command (CENTCOM) - the military command involved.
›Target this Legal Point: San Remo Manual (1994) as the key code for naval warfare.

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News Snapshot

⚓

Naval Blockade & Seizure

The US seized the Iran-flagged cargo ship Touska in the Gulf of Oman for violating a naval blockade imposed days after a ceasefire.

⚖️

Legal Grey Zone

The action's legality hinges on whether the ceasefire is considered wartime (LOAC applies) or peacetime (UNCLOS applies).

📜

Key Legal Instruments

The San Remo Manual governs naval warfare, UNCLOS governs peacetime seas, and Prize Law historically deals with captured vessels.

Detailed Analysis & Strategic Depth

Context / Background

The conflict began on February 28, 2026, with Iran closing the Strait of Hormuz. A ceasefire on April 8 was followed by a US blockade on April 13. This creates a legal limbo: is the conflict active or terminated? International law lacks a global enforcer, relying on treaties like UNCLOS for peace and the Law of Armed Conflict (LOAC/IHL) for war. A ceasefire is a tactical pause, not a legal end to war, which is central to this dispute.

Core Analysis & Implications

If the ceasefire ended the war, UNCLOS applies, guaranteeing 'freedom of the high seas' and making the US seizure illegal under peacetime rules. If war persists, LOAC applies via the San Remo Manual, allowing belligerents to visit, search, and capture enemy merchant vessels. The US action followed wartime protocols (warnings, disabling propulsion), adhering to principles of proportionality and precaution. This case tests the modern application of historical Prize Law, where captured vessels are adjudicated in domestic courts.

Future Outlook / Way Forward

The incident underscores the need for clarity on the legal status of ceasefires and blockades in modern conflicts. It may influence state practice and future interpretations of IHL. The outcome of diplomatic talks, like those scheduled in Islamabad, will determine whether the ceasefire holds or collapses, ultimately deciding the legal framework governing future actions in the region.

Key Facts at a Glance

Date of US SeizureApril 19, 2026

Ceasefire DateApril 8, 2026

US Blockade StartApril 13, 2026

Key Legal ManualSan Remo Manual (1994)

You've read the full analysis. Now test your understanding.

Practice exam-style questions based on this article.

Q1Static LinkageEasyUPSC, SSC

Which US military command was responsible for the warnings and operation leading to the seizure of the Iranian ship Touska?

Q2Statement-basedHardUPSC

Consider the following statements regarding the legal frameworks discussed in the news:

1. The United Nations Convention on the Law of the Sea (UNCLOS) is the primary treaty governing maritime activities during peacetime.

2. The San Remo Manual is an international code that governs the conduct of naval warfare and is part of International Humanitarian Law.

3. Under the Law of Armed Conflict (LOAC), a formal declaration of war is a mandatory prerequisite for an 'international armed conflict' to exist.

Which of the statements given above is/are correct?

Q3Data-centricMediumUPSC, SSC, State PSC

According to the article, on which date did the temporary ceasefire between the US-Israeli alliance and Iran take effect?

Q4Application/ImpactMediumUPSC

What is the primary legal consequence, as per the article, if the April 8 ceasefire is interpreted as having ended the armed conflict?

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US Seizes Iran Ship Touska in Gulf of Oman Under San Remo Manual and UNCLOS, Tests Ceasefire Legality Under LOAC

Exam Lens

Quick Exam Facts From News

1-Minute Revision

News Snapshot

Naval Blockade & Seizure

Legal Grey Zone

Key Legal Instruments

Detailed Analysis & Strategic Depth

Context / Background

Core Analysis & Implications

Future Outlook / Way Forward

Prelims Flashpoints

Key Facts at a Glance