Well, no one had seen the train coming - and the mission precis did say informing the people and helping them evacuate was more important than keeping voidspace a secret, if it came to that.

... That, and she had a cloaking routine for the bubble, once they got moving. Nita wasn't entirely shotgunning this!

"The speed shouldn't shake us once we're moving, but you might want to brace yourself!" she warned, then sent the bubble the command to move.