As the tsunami enters the shoaling waters of coastlines in its path, the velocity of its waves diminishes and wave height increases.
2.
Rapidly shoaling water less than 20 fathoms ( 37 m ) deep and land masses on two sides of the submarine limited her maneuverability.
3.
However, with rapidly shoaling water and her keel about to touch bottom, " Tang " drew back, fired a spread of three with two hits, and then surfaced as survivors of the 6, 886 tons cargo ship " Asukazan Maru " were being rescued by fishing boats.