crash-dive
noun
Definitions
An emergency maneuver by a submarine in which it suddenly descends, especially to considerable depth, usually in order to escape an attack or to avoid a collision.
A rapid descent by a person or thing ending in a violent collision.
verb
Definitions
(often hyphenated, submarine operation) To perform a crash dive.
(often hyphenated, submarine operation) To cause (a submarine) to perform a crash dive.
(often hyphenated) To rapidly descend, intentionally or accidentally, in a manner that ends in a violent collision.
(often hyphenated) To rapidly descend, in a manner that ends in a violent collision with (something).