Submariner

Iran's Revolutionary Guards have seized a US submarine drone in the Strait of Hormuz, saying the operation was carried out for data recovery, according to NDTV. The incident marks a new flashpoint between Tehran and Washington in the strategic waterway, through which a large share of the world's oil passes, and comes amid ongoing tensions over naval activity in the Gulf.

The U.S. Navy is moving forward with development of the W93, a new nuclear warhead intended for submarine-launched ballistic missiles. The programme, run with the Department of Energy's nuclear weapons complex, is part of efforts to modernise the sea-based leg of the U.S. nuclear triad, replacing warheads carried on Trident II D5 missiles aboard ballistic missile submarines.

The United States is developing the W93, its first new nuclear warhead in nearly four decades, intended for deployment on submarines. Coverage explains the warhead's design goals, its place in the US nuclear modernisation programme, and debates over cost, arms control concerns and whether the programme could spark a new arms race.

Meta is building a transoceanic submarine cable capable of petabit-per-second speeds, intended to connect multiple continents. The project, shared by researcher Gabriele Romano, would rank among the largest private internet infrastructure efforts ever undertaken. Interest centres on how the cable could boost global bandwidth and what it signals about major tech firms building their own backbone networks rather than relying on telecom consortia.

Finland and Sweden are getting a new submarine data cable across the Baltic Sea. Finnish broadcaster Yle, citing Swedish public broadcaster SVT, reports that explosive growth in artificial intelligence and data centres has sharply increased demand for new digital submarine connections. The project reflects a broader European push to expand digital infrastructure and secure connectivity between Nordic countries.

The US Navy's W93/Mk7 nuclear warhead program has moved into a new development phase. The W93 is intended as a future replacement warhead for the Navy's submarine-launched ballistic missile arsenal. The milestone signals continued progress in the Pentagon and Department of Energy's long-term effort to modernize the US nuclear weapons stockpile, a costly and politically sensitive undertaking.

A new submarine cable between Finland and Sweden has been announced, according to Sweden's public broadcaster SVT, citing Finnish media Yle. The cable would strengthen telecom connections across the Baltic Sea, a link that has drawn attention amid recent concerns over undersea infrastructure security in the region.

A robotic submarine deployed beneath Antarctic ice mapped unusual structures on the seafloor before disappearing without a trace. The lost vehicle reportedly recorded strange formations under the ice shelf before contact was cut off. The disappearance has drawn attention because the sub was gathering rare data from one of the least explored environments on Earth, raising questions about what it found and why contact was lost.

Japanese Defense Minister Shinjiro Koizumi has again called for an open national debate on nuclear weapons and nuclear-powered submarines, saying Japan should discuss such issues "without taboos." He expressed frustration that an atmosphere of reluctance still discourages serious public discussion of nuclear options, a sensitive topic given Japan's postwar pacifist identity and history as the only nation attacked with atomic bombs.

The U.S. Navy is moving forward with the W93, a new nuclear warhead intended for the Trident submarine-launched ballistic missiles that arm its ballistic missile submarines. The program represents part of the broader modernization of America's sea-based nuclear deterrent, replacing warhead designs that date back decades. The development is drawing attention amid ongoing debates over nuclear weapons spending and strategic competition.

Japan's Defense Minister Shinjiro Koizumi is calling for an open national debate on nuclear issues, including the possibility of nuclear-powered submarines. Any move to discuss nuclear options marks a highly sensitive shift in Japan, the only country to have suffered atomic bombings, where postwar policy has long adhered to the three non-nuclear principles. The proposal is drawing attention to how far Tokyo's security debate may go amid regional tensions.