Sea Drones Emerge as Key Defence Technology

Sea drones, also called unmanned maritime systems, are naval platforms that operate on the surface or underwater without an onboard crew. In June 2026, several countries used unmanned surface vessels, extra-large uncrewed underwater vehicles, and autonomous drone boats in military exercises, logistics missions, and rescue operations in the Indo-Pacific and the Middle East.

Types of Sea Drones

Unmanned surface vessels (USVs) operate on the sea surface and can carry sensors, communications equipment, or weapons. Uncrewed underwater vehicles operate below the surface and are used for surveillance, strike missions, mine countermeasures, and logistics support. Extra-Large Uncrewed Underwater Vehicles (XLUUVs) are a larger class of underwater drones designed for long-range and heavy-payload missions.

Recent Military Uses in 2026

On 25 June 2026, US special forces in the Philippines tested Ukraine-developed Magura-class USVs, and one vessel struck and sank a decommissioned target ship. In early June 2026, a US Navy sea drone operated by Task Force 59 carried out a rescue mission off the coast of Oman and recovered two American crew members after an Apache helicopter crash.

Platforms, Exercises, and Industrial Developments

During Exercise Salaknib 2026, the US Army used solar-powered drone boats to guard a cargo run in the Philippines. The United States also transferred four Ocean Aero Triton sailing USVs to the Philippines to monitor movements in the Philippine Exclusive Economic Zone. At RIMPAC 2026, which runs from 24 June to 31 July and involves 31 nations, Havoc planned to demonstrate autonomous surface vessels for multinational logistics.

Important Facts for Exams

• Task Force 59 is a US Navy unit associated with unmanned maritime operations in the Middle East.
• RIMPAC is the Rim of the Pacific Exercise, one of the largest multinational naval exercises in the world.
• The Philippine Exclusive Economic Zone extends up to 200 nautical miles from the baseline under the United Nations Convention on the Law of the Sea.
• Magura-class USVs are Ukrainian unmanned surface vessels used for maritime strike roles.

Market and Defence Industry Context

A June 2026 market estimate placed the global autonomous maritime defence systems market at 3.8 billion US dollars in 2025. The same estimate projected the market to reach 12.1 billion US dollars by 2034, with growth linked to unmanned naval platforms and AI-based autonomy.