Yes, there are submarines that are used as pleasure vessels in waters that have clear water, and there are very wealthy people who have their own submarine for fun. Most submarines are very expensive, and either used for research or for military purposes.
you press Q AND X to use submarine reflection. you press Q and X to use submarine reflection.
For fun and to socialise with people.
study submarine procedures and sleep
They use a periscope. See the related link for more information.
Most people would use the abbreviation 'sub.' The US Navy uses the prefix SS to indicate a submarine. If it is SSN, it would indicate a Nuclear Powered submarine and SSBN would be a ballistic missile nuclear powered sub.
A submarine.
"The submarine fired a torpedo at the large ship."
fun
After you find the submarine you use dive up to the surface.
All submarine ranges and ovens are electric or microwave.
Actually the submarine will not kill any one, but the rockets and torpedo launched from the submarine kill the people.
A submarine is kept at, or close to, surface air pressure.