Vocabulary Words

2. A system that uses sound waves to detect objects underwater.
3. Designed or used to attack ships.
4. Recorded or written down as proof of something happening.
6. A system that uses two different sources of energy or power to operate something.
10. New ideas, inventions, or improvements on existing things.
12. A smaller vehicle designed for underwater use, but it needs help from a larger ship to supply air and power while operating underwater.
13. To go or put something beneath the surface of water.
14. Designed or used to attack submarines.
15. A machine that generates energy using nuclear reactions, providing a lot of power for submarines.

1. Long, flat tools used for paddling a boat through the water.
5. Weakened or damaged secretly or gradually, often used in the context of attacking something in a hidden way.
7. To refill with fuel to continue operating.
8. A group of ships or vehicles that operate together.
9. A medical condition that happens when a diver rises too quickly to the surface of the water, causing bubbles to form in the body.
11. A type of boat or ship that can operate underwater and does not need help from other ships to stay underwater or renew its air and power supplies.
16. A technology that uses radio waves to detect and locate objects, like ships or aircraft.