Hmm I was thinking there could be someone trying to attack the site and Pria finding put about it, overhearing a conversation while waiting for Hensen to rwturn, but that might be a bit much. Or the ship could get in trouble on the way back (perhaps Hensen did not have his dad's permission to tale the ship like he said he had?). Or they could be attacked on their way back, robbers having spotted the expensive shuttle and wanting to grab it for themselves... Maybe someone would want to grab Hensen for ransom?