
What Replaces the Constellation-Class Frigate Program
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Warship and submarine classes broken down by hull, propulsion, sensors and armament, with displacement, range and combat figures given their sources.

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The electromagnetic railgun promised Mach 6 projectiles at projectile-only cost, reached full-scale tests at Dahlgren, and was quietly shelved as hypersonic missiles took its budget.

From a diesel trimaran that once sailed itself from Hawaii to California to missile-firing Ghost Fleet hulls, unmanned surface vessels have moved from DARPA experiment to fleet program in a decade.

Barnacles and slime cost navies measurable speed and fuel; the answer is a layered regime of antifouling paints, foul-release silicones, and disciplined dry-dock cycles.

CEC merges the radar tracks of an entire force into one fire-control-quality picture, and with NIFC-CA it lets a destroyer engage an over-the-horizon target it never saw itself.

Countering sea mines once meant manned ships sweeping exposed water; the U.S. Navy now hunts them with sonar-carrying underwater vehicles and neutralizes them from helicopters.