It's 3 o'clock in the morning The dreams I lived with you was serene We were traveling in submarine The whales were smiling of love while welcoming

SEOUL, Oct 3: North Korea said on Thursday it had successfully test-fired a new submarine-launched ballistic missile (SLBM) from the sea to contain external threats and bolster self-defence, ahead of fresh nuclear talks with the United States.

For the first time, humans will visit the deepest part of each of the five oceans, plunging to the sea floor using a two-person craft designed to withstand the intense pressures more than 10km below the surface.

With a submarine crewed by 44 sailors missing off the coast of Argentina, we recall some of the worst submarine disasters in history.

In what is said to be its largest ever underwater defence deal, India has initiated the process to acquire six new submarines which are seen as crucial to counter China’s growing undersea prowess.