WordNet
n. a rapid descent by a submarine
Wikipedia
Crash Dive is a World War II film in Technicolor released in 1943. It was directed by Archie Mayo, written by Jo Swerling and W.R. Burnett, and starred Tyrone Power, Dana Andrews and Anne Baxter. The film was the last for Power, already enlisted in the United States Marine Corps, before assignment to recruit training also known as boot camp.
Usage examples of "crash dive".
The sub must have detected their radar signals and would now be attempting a crash dive.
Then it is the same old drill, the crash dive, which was so exciting when he was a young man practicing it in the Baltic, and has become so tedious for him now.
She paused to refocus her lens, when she saw the submarine's bow slip beneath the ice pack as it began to crash dive.
It was standard service procedure to crash dive immediately all torpedoes were fired and to await the explosions of the hits down in the safety of the depths, but this time Kurt felt compelled to remain on top and watch it happen.
He should have stayed at a couple of miles' distance - which in an emergency would have given him plenty of time to crash dive - ordered us to send across a boat, loaded it up with a half-dozen men with machine pistols and sent them back to take over the San Andreas.