In Star Trek TNG: S5:E1 "Redemption, Pt 2" - Commander Sela states:
SELA: Yes I know and so does Picard. He's giving us exactly what we need and he expects us to take it. No. We won't step into Picard's trap. We will disable part of his network here, where they're weakest. We'll direct the energy burst right at the ship with the android Captain.
How did Sela know that Data was in command of the Sutherland? (other than the dramatic out-of-universe reason that it provided further tension to the C plot of Data's ability to command and interact w/ a horrible first officer)