Hard Power · Critical Technology · Sensing, Timing & Navigation

Acoustic & Undersea Sensing

The capacity to sense with sound: sonar, acoustic arrays and the undersea sensing technologies on which undersea warfare, seabed awareness and ocean science all rest.

Developments: 79late 19th century to September 2026
With medium: 9335 very high
Nations: 20
Unverified: 350 verified

Timeline

Every development graded as belonging to this capability, wherever it is kept: very high (about it), high (directly and substantially changes it), medium (a direct, material effect on it). A model gave the grades, reading each entry against the framework. A structured starting point, not a cited record. An entry marked unverified has not been checked against a source; tiers are assigned by a model and are not comparable between nation and capability timelines.

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