submarine nets

Submarine nets are large, tight barriers made of sturdy steel or other strong materials, designed to block or trap underwater vehicles like submarines. They are typically installed across strategic waterways or harbors to prevent unauthorized or hostile subs from entering. These nets are anchored to the seabed and can be deployed or removed as needed. While modern technology has reduced their effectiveness, historically, they served as an early form of underwater security, combining mechanical obstruction with strategic positioning to protect important maritime areas from covert threats.