Hard Power · National Security · Maritime Power

Sea Denial & Undersea Warfare

The capacity to make the sea unusable to an adversary, without requiring command of it oneself: submarines, mines, coastal missiles, uncrewed vessels and the undersea fight.

Developments: 390939 to September 2026
With medium: 434199 very high
Nations: 102
Unverified: 2883 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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