The Legal Framework Governing Naval Blockades
Activists frequently claim that Israeli naval forces act illegally when stopping sea vessels attempting to navigate to the Gaza coast. According to reporting by legal affairs journalist Jeremy Sharon in The Times of Israel, Israel formally declared a naval blockade off Gaza in January 2009 during Operation Cast Lead. The primary objective of this measure was to prevent the Hamas terrorist organization from smuggling armaments and military materiel via Mediterranean sea routes. According to the Jewish Virtual Library, such blockades possess legal recognition under both the London Declaration of 1909 and the San Remo Manual on Naval Warfare.
Dr. Eran Shamir-Borer, director of the Center for National Security and Democracy at the Israel Democracy Institute and former head of the International Law Department within the Military Advocate General's Corps of the Israel Defense Forces, explained that blockades are standard operations in armed conflicts. Shamir-Borer emphasized that Israel satisfies the established criteria for imposing and enforcing a maritime blockade under international legal standards.
International Inquiries and Legal Authority to Intercept
The lawful character of Israel's naval cordon has been examined by international inquiries. As highlighted in The Times of Israel, a panel of inquiry established by the United Nations Secretary-General in September 2011—chaired by former New Zealand Prime Minister Sir Geoffrey Palmer—reviewed the 2010 Mavi Marmara confrontation. The Palmer inquiry determined that the naval blockade was lawfully instituted as a legitimate act of self-defense to prevent incoming weapons shipments.
Under the San Remo Manual, naval forces are explicitly authorized to capture vessels attempting to breach an established blockade, including neutral civilian ships. The Jewish Virtual Library notes that when flotilla organizers openly declare their intent to penetrate the cordon, international law permits enforcement actions even outside territorial waters. Interceptions in international waters are lawful when approaching vessels demonstrate a clear intention to violate the designated perimeter.
Blockade Enforcement and Humanitarian Shipments
Legal analysts and official agencies counter that maritime restrictions do not limit the delivery of humanitarian provisions through coordinated ground routes. Records reported by The Times of Israel show that between September 14 and September 19, 2025, 736 humanitarian trucks transported 14,125 tons of relief into Gaza, while Israel's Coordinator of Government Activities in the Territories facilitated internal movement for approximately 1,700 truckloads. By contrast, activist flotillas, such as the Global Sumud Flotilla carrying 250 tons across roughly 35 small craft, transport a tiny fraction of the supplies processed through authorized crossings.
The Israel Ministry of Foreign Affairs stated that unauthorized voyages into closed conflict waters undermine orderly relief logistics, while Israeli Police spokesperson Dean Elsdunne noted in The Jerusalem Post that such initiatives focus on generating social media publicity rather than supplying necessary goods.