Harley, you certainly sound like the expert on this matter, but if you really think about it, from the very moment it's launched horizontally from a submarine, it likely takes more than or about 10 seconds before it even reaches and breaks the surface of the water, then it still has to climb to an adequate altitude and speed before all the aforementioned control surfaces extend, the rocket is jettisoned and the turbine takes over. Realistically, 10 seconds is not nearly enough time for all this to take place. I saw this program on missiles last night and I'm almost certain that a burn time of 90 seconds was mentioned for the rocket booster. However, I could be wrong and you certainly know more about this one than I do. Anyway, keep the info coming. I know this is not jet related, but certainly an interesting topic. Hopefully, the thread will stick for a while. Regards,

Richie