Definition of crash-dive in English:

crash-dive

verb

[NO OBJECT]
  • 1 (of a submarine) dive rapidly and steeply to a deeper level in an emergency.

    • ‘Often, in the mid-Atlantic, after forcing U-boats to crash-dive, carrier planes dropped homing torpedoes on the submarines.’
    • ‘These allowed a submarine to surface and crash dive without having to send out crewmen to dismantle the mast in an emergency.’
    • ‘Anyway, Brick's good piloting brought the sub back in view, now crash-diving to yet away.’
    • ‘If the submarine had come under attack, both men would have quickly drowned with no hope of escape as their boat crash-dived.’
    1. 1.1(of an aircraft) plunge steeply downward into a crash.

noun

  • A steep dive by a submarine or aircraft.

    • ‘Forty minutes later we make a crash dive, regrouping at 15m below the surface current that whips across the reef-top.’
    • ‘‘There was a lot of noise and debris flying about and the helicopter went into a controlled crash dive but Pete had only partially detached himself,’ said Mr Dell.’
    • ‘The man admitted that he had been playing with the helicopter and was making a crash dive move.’

Pronunciation:

crash-dive

/ˈkraSHˌdīv/