Usually by inflating bags that have been placed inside the submarine.
The object used to view the outside from inside the submarine is called a periscope.
study submarine procedures and sleep
You light it inside an airtight submarine.
A submarine is kept at, or close to, surface air pressure.
The submarine is manned by the crew, and crew members are called submariners.
Actually the submarine will not kill any one, but the rockets and torpedo launched from the submarine kill the people.
The water would rush in and sink the sub. The pressure would equalise rapidly and when it does, the people inside would be crashed if they were too deep.
no
Go back to Slateport town. Inside the ferry building, you will find captain stern and the submarine being robbed by Team Aqua.
This is an opinionated question...
The Sea people