Sorry to necro this thread, but I just ran across this:
Quote:
|
Statements by various prisoners indicated that it is considered quite normal for a U-Boat to crash-dive to the usual 30 metres (98 ft.) in 28 seconds or less. One man said that "U 660" could reach this depth in 24 seconds, but others did not confirm this.
|
From an interrogation of prisoners from U-660.