At the end of ST4 - TVH, the crew seems to not know what kind of ship they're being assigned to. How likely would that be? I know that US Naval Crews are trained to crew the vessels they're assigned to. Wouldn't that be likely in Star Fleet? In fact I think they show this at the start of TWOK. So it seems to me the command crew must of known they would be assigned a Constitution class ship. I certainly doubt they would be assigned to the Excelsior without prior training. Her systems were all new and experimental.