Which vessel introduced modern submarine design, as cited in the material?

• A. HMS Dreadnought
• B. USS Holland (SS-1)
• C. USS Nautilus
• D. German U-boat Type VII

Answer: (B)

The main idea here is recognizing the first practical, modern submarine design that established a standard for future undersea vessels. The vessel designed by John Philip Holland and adopted by the US Navy did exactly that: it introduced a workable, purpose-built submarine with features that defined underwater operation.

It paired surface propulsion with an electric motor for submerged running, allowing true underwater mobility rather than just a float-and-dive capability. It used ballast tanks to submerge and surface controllably, and it carried the gear needed for underwater endurance and reconnaissance. This combination of propulsion, ballast, and streamlined hull design became the template other navies would follow, making it the first modern submarine design in practice.

In contrast, the other options reflect different naval innovations: a battleship that revolutionized surface warfare, the first nuclear-powered submarine that came many decades later, and a later WWII-era submarine design that built on earlier concepts but did not inaugurate the modern template.