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danny

FreeWriting

Submarines: Exploring the Depths of the Ocean

A submarine is a watercraft designed to operate underwater for extended periods. These vessels play crucial roles in military defense, deep-sea exploration, and scientific research. Submarines have evolved from simple underwater boats to highly sophisticated vessels capable of diving to great depths and staying submerged for months. History of Submarines Early Submarine Development The concept of submarines dates back to the 17th century , with early designs like the Turtle , a one-person submer

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