A volcanic island's steep underwater slopes can act as a natural barrier against submarines
The dramatic underwater geography of Iwoto Island features steep volcanic slopes that drop thousands of meters, creating a natural acoustic shield that can effectively hide or block submarine movements.
Iwoto, also known as Iwo Jima, sits atop a massive volcanic front where the Philippine plate dives deep into the earth. This subduction creates a specialized bathymetry with slopes that plunge into 8,000-meter-deep trenches. These steep underwater cliffs interfere with sound channels at depths of 1,000 meters, complicating the sonar detection of submarines.
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