Many instances of submarines being 'caught' by fishing vessels are on record. There is one instance of a submarine being captured by an abandoned balloon, and on another occasion a submarine rescued a blimp and towed it to safety. A church in Kyoto, Japan calls its congregation to worship with a bell from a submarine. For entertainment on U.S. submarines movies, television, ice cream machines and stereo music players are available. There have been instances of boxing matches held onboard, and the crew of one submarine had a kite flying contest from an anchored submarine.
Modern submarines can travel faster submerged than they can on the surface.
They can fully submerge in less than a minute. Robert Fulton, inventor of the steamboat, was an avid submarine enthusiast. He built several submersible warships, one of which was known as the Nautilus. The rig for dive in a modern submarine requires the crew conduct more than 225 individual and operational checks. The submarine was not generally recognized as a legitimate instrument of warfare until the Civil War.