There's at least 51 USN subs resting in the Pacific. One's in the Atlantic. If the question is asking about operational submarines, an exact count would be difficult to obtain, but there are certainly hundreds. Many navies of the world have a submarine force, even if it consists of only one or two subs.
submarines dont sail idiot
With submersibles, sonar, magnetometers, and satellites.
The Southern Ocean which surrounds Antarctica is dangerous for any ship, and especially for submarines, because of the high-volume of icebergs.
Atlantic Ocean.
They send underwater submarines to study the ocean floor.
Atlantic Ocean.
Straight to the bottom of the ocean.
Atlantic.
Scuba Bob's Ocean Quest - 2006 Stanley Submarines 4-23 was released on: USA: 2009
yes at the bottom of the ocean.
Some Japanese submarines were used in the Indian ocean, but none had enough range to reach Europe.
With other submarines, ships and aircraft. Possibly also with detectors that sit on the bottom of the ocean and transmit a signal when a sub is detected.