Submarines - Special boats that go underwater., Periscopes - Devices on submarines for observing surroundings., Ballast Tanks - Tanks controlling the submarine's buoyancy., Propellers - Rotating blades moving the submarine through water., Sonar - Underwater radar helping submarines detect objects., Torpedoes - Underwater missiles used as weapons., Nuclearpowered - Submarines using nuclear energy for propulsion., Buoys - Floating devices used for navigation., Radar - Technology using radio waves to detect and locate objects., Pioneers - Early innovators or trailblazers in a field.,

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