A submarine (or sub) is a vessel that goes underwater. Most large submarines are war vessels. Some small ones are used for scientific or business purposes. These are often called "submersibles" and cannot go far or stay long away from base. Some people buy their own to explore under the sea. A submarine is a boat, not a ship.
Submarine
Questions and Answers
Q: What is a submarine?
A: A submarine is a vessel that goes underwater.
Q: What are most large submarines used for?
A: Most large submarines are used as war vessels.
Q: What are small submarines used for?
A: Small submarines are often used for scientific or business purposes.
Q: What are small submarines commonly called?
A: Small submarines are commonly called "submersibles".
Q: Can small submarines go far or stay long away from base?
A: No, small submarines cannot go far or stay long away from base.
Q: Are submarines considered boats or ships?
A: Submarines are considered boats, not ships.
Q: Why do some people buy their own submarines?
A: Some people buy their own submarines to explore under the sea.