RedactedNarrative: Vessel #1 stopped in Maumee river to look at 280-bridge after they had passed.  Vessel #1 then powered up (plowing mode) and as bow was in the up position and obstructing view, struck a red lit bouy.  I made multiple attempts to get passenger 6 and 7 information and was unsuccessful as the other passenger was unsuccessful in contacting them for their personal information.  Passenger 6 and 7 had left the scene prior to our arrival and given a ride to shore by a good Samaritan.