How did U.S. Gato- and Balao-class submarines contribute to the Pacific war?

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USS Nautilus — submarine The former USS *Nautilus*, launched in 1954, being towed to Groton, Connecticut, to become a museum, May 1985.

The U.S. Gato- and Balao-class submarines were instrumental in the highly successful submarine campaign waged by the United States during the Pacific War. These vessels were designed as long-range, diesel-electric submarines, measuring approximately 311.5 feet in length with a displacement of 1,525 tons.1

Key features and contributions of these classes included:

Operational Capability: Both classes were equipped with diesel-electric machinery, allowing for surface speeds of 20 knots and underwater speeds of nine knots.1
Structural Improvements: The primary distinction between the two was their operating depth; the Gato class was rated for 300 feet, while the Balao class featured an improved design capable of reaching 400 feet.1
Armament: Each boat was heavily armed to engage enemy targets, carrying 24 torpedoes deployed through 10 tubes (six forward and four aft). They were also equipped with one or two five-inch deck guns and additional antiaircraft weaponry.1
Crew: These submarines were operated by a crew of 65 to 70 personnel, providing the endurance and capability necessary for extended operations across the Pacific theater.1