crash dive

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crash dive

a sudden steep dive from the surface by a submarine
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
At any rate, Onishi and others considered crash-dives of utmost importance for they would `demonstrate the heroic Japanese spirit'.
to crash-dive into its self-proclaimed first war of the 21st century,'' Inoue stressed, but added that it is difficult, even callous, to tell the victims, kin and friends of the dead to be rational and to try and view the incident in a wider context.
When they see trouble coming, they run partway down a stalk, crash-dive to the ground, and try to hide.