Why Anti-Israel Flotillas to Gaza Are Illegal Under International Law

Forty anti-Israel activists set sail aboard the ship “Al Awda” with the intention of breaching the blockade around Gaza. Just outside Maltese waters last week, two drones of unknown origin targeted the ship’s generators, causing no injuries but leaving the vessel stranded at sea.

Nearby countries are refusing to allow the Al Awda to dock, and spokespeople for the activists, as well as Greta Thunberg, claim the drone attack to be a violation of international law. It is not.

Why is there a blockade around Gaza?

Hamas, the internationally designated terror organization that rules Gaza, uses foreign supplies, including international aid, to carry out a variety of combat operations, including the October 7, 2023, massacre against Israel, and much of the fighting since that time.

In 2010, an “aid ship” called the Mavi Marmara attempted to break Israel’s blockade on Gaza. Upon boarding, Israeli forces discovered large quantities of weapons and other military equipment, intended for use against Israelis by Gaza’s various terror organizations.

The incident had put Israel in an impossible “Catch-22”: either allow the delivery of weapons to terror organizations, or else suffer international condemnation for attacking a vessel that (falsely) claims the moniker “humanitarian.” It is likely that the Al Awda was hoping for a similar “win-win” scenario: to either successfully supply Hamas, or at the very least, to harm Israel diplomatically in the attempt.

Why did Israel freeze aid to Gaza?

On March 2, 2025, Israel temporarily froze the flow of humanitarian aid into Gaza (as permitted by Article 23 of Geneva Convention IV) because such aid is typically transferred to enemy combatants instead of civilians.

Specifically, Hamas habitually steals international aid, as well as torturing and killing civilians who attempt to take aid for themselves. This reality has been confirmed by multiple international sources, including the United Nations, and has been caught on camera numerous times. Hamas uses aid materials to raise funds for combat, as well as directly in combat operations, such as fueling rockets or using concrete to build terror tunnels where Israeli hostages remain in captivity.

It is not known whether the Al Awda carried weapons, but based on the example of the Mavi Marmara, this must be considered a real and dangerous possibility for any un-inspected vessel. Even if the Al Awda were not carrying weapons, all materials that enter Gaza could very well end up being used by Hamas either to indirectly fund, or to directly carry out, terror activities.

Is a naval blockade legal?

A naval blockade is governed by the San Remo Manual on armed conflicts at sea and, when made pursuant the San Remo rules, is considered a legal act of war. Legal blockades have been used in numerous conflicts, including around Nazi Germany and Japan during World War II, and today around Russia and Iran.

By the same international rules, attempting to break a legal blockade is an act of combat. Specifically, Article 67 of San Remo states (in relevant part) that, “merchant vessels flying the flag of neutral States may not be attacked unless they are believed on reasonable grounds to be…breaching a blockade.”

International law provides a number of mechanisms for legally transferring aid to a blockaded territory, however attempting to break a legal blockade is not one of them.

Being in international waters does not guarantee impunity.

Section 10 of San Remo explicitly states that its rules apply to the “high seas,” which is a legal term often used with respect to international waters.

Therefore, when a ship is en route to a blockaded territory, with the intention of attempting to break the blockade, that ship is already engaged in an act of war under the terms of San Remo.

Anyone who follows naval history knows that battles often take place on the “high seas” and for good reason: if San Remo prohibited countries from striking an invading navy until it reached their shores, then international law would have effectively outlawed self defense. Therefore, even being en route to commit an act of war (such as breaching a legal blockade) opens the invading vessel to legitimate attack.

The crew and passengers of the Al Awda are not civilians.

The Geneva Convention Additional Protocol I defines three categories of persons in a conflict: 1. combatants (Article 43), 2. civilians (Article 50), and 3. any person who has taken part in hostilities but who does not qualify as a legitimate combatant under Article 43 (Article 44).

According to San Remo, activists aboard the Al Awda are taking part in hostilities, and they are therefore “non-civilians,” under international law and are “unlawful combatants” under the laws of numerous countries, including Israel and the United States.

Was the attack on Al Awda legal?

Israel has not taken responsibility for the drone attack on the Al Awda. However, under San Remo and the Geneva Conventions, Israel would be absolutely justified in treating the Al Awda, and all persons aboard, as hostile combatants. Under these circumstances, engaging the Al Awda, including in international waters, would have been absolutely permitted under international law. Merely stranding the vessel is not only permitted, but an enormous act of restraint.

Any shipment of supplies to Gaza, where Hamas controls all such deliveries, places Israeli civilians in direct and significant military danger, even as such shipments fail to help Gaza’s civilians. On the other hand, going after a vessel that claims to be “humanitarian” places Israel in diplomatic danger, even if due only to widespread ignorance of international law.

Therefore, the drone incident on the Al Awda, which took no lives, and cannot be officially traced to any source, combined with the regional refusal to allow the Al Awda safe harbor, has confounded both outcomes. In all likelihood, lives have been directly saved by last week’s events off the Malta coast.

Daniel Pomerantz is the CEO of RealityCheck, an organization dedicated to deepening public conversation through robust research studies and public speaking.

The post Why Anti-Israel Flotillas to Gaza Are Illegal Under International Law first appeared on Algemeiner.com.