Both submarines launched...
Every time I see the scene where they're about to launch the two submarines.. the control room states that Stromberg 1, you are cleared to proceed to sea, Stromberg 2, you are also cleared to proceed to sea..." which is like.. uh ok.. what if BOTH submarines go at the same time, bang.. one hits the other..!
The announcer should have waited until Stromberg 1 was cleared to let the other go..!