Submarine Warfare in the 20th & 21st Centuries: A Bibliography

摘要

There are constant motions in the sea caused by atmospheric and seabed activities volcanic disruptions marine animals ships and submarines -- all of which create what is called the ambient noise level of the oceans. Today acoustics is the basis of both submarine and antisubmarine warfare: the single most significant element upon which all undersea warfare activity depends. When the submarine was first developed its security lay beneath the surface of the ocean where it would not be seen. Today its security lies in its ability to avoid being heard.