Sea Mines
History, Types, and International Law
Sea mines are explosive devices placed underwater to damage or destroy ships. They have been a key naval weapon since the American Civil War and were extensively used in both World Wars. Types include moored contact mines, influence mines (triggered by magnetic, acoustic, or pressure signatures), and remotely controlled mines.
- The Strait of Hormuz has been mined before: Iran threatened mining in the 1980s Tanker War; the US conducted minesweeping operations in the Gulf during that period.
- Under the 1907 Hague Convention VIII on the Laying of Automatic Submarine Contact Mines, belligerents must notify neutral nations of minefields and take precautions to protect peaceful shipping.
- Mine-clearing (minesweeping/minehunting) is time-consuming and technically complex: the US Navy uses dedicated mine countermeasure vessels (MCMs) and unmanned underwater vehicles.
- Pentagon assessments cited in media suggested clearing the strait of Iranian mines could take up to six months; the Pentagon disputed the specifics but did not deny the broad challenge.
- India, which depends heavily on Gulf oil imports, faces significant exposure to any prolonged mining of the strait.
● Tracked since April 23, 2026 · last seen June 24, 2026 · updates as the daily brief publishes
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