In the narrow and perpetually contested waters of the Strait of Hormuz, a silent machine became the center of competing narratives. Iran's Revolutionary Guards announced Tuesday the capture of a U.S. Dive-LD autonomous underwater drone, framing it as a tactical triumph over American military technology; the Pentagon countered that the vehicle had already malfunctioned and carried nothing of consequence. The episode, whatever its precise truth, illuminates the quiet but accelerating contest being waged beneath the world's most strategically vital seas — one fought not by sailors, but by machine