Crash dive

Alarmtauchen referred to in sailor language the sudden in dangerous situations filling the ballast tanks and set the extreme angle of the hydroplanes while top speed to dive as quickly as possible with a U- boat.

The submarine is brought by the drive itself and at the same time by reducing the lift very quickly into deeper areas to drive him into attacks or in danger of, for example, water bombs to safety and the Enlightenment by the sonar in the so-called thermal layer, a zone of cold water, which complicates an acoustic positioning to protect.

Since the angle of the submarine during a crash dive and the rate of descent are very large, the crew must make sure that no parts flying around inside the submarine and that the submarine is caught in time before reaching to great depths or even the seabed because it can cause damage to the submarine else.

The opposite of the alarm diving is referred to as alarm emergence or " blow out".

• Submarine as a theme