Bir tsunami, depremlerin veya denizaltı volkanik patlamalarının neden olduğu bir dizi dalgadır. - A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions.
Undersea things or activities exist or happen below the surface of the sea. an undersea pipeline running to Europe. undersea exploration. happening or existing below the surface of the sea
German Unterseeboot ("undersea boat") German submarine. The first German submarine, the U-1, was built in 1905. During World War I Germany became the first country to employ submarines in war, and during World War II its U-boats dominated the Battle of the Atlantic until the Allies developed new antisubmarine tactics. The principal German U-boat was the type VII; the VIIC variant was 220.25 ft (66 m) long, displaced 769 tons on the surface, carried one 90-mm deck gun and five torpedo tubes, and was manned by a crew of
Modern German U-boats are built for the German navy and navies of allied countries; their sophisticated structures, electonics, and propulsion systems allow them to be used for intelligence gathering and special operations in addition to defending sea lanes and threatening enemy forces