Look here I found a STREET VIEW from there and you can clearly see the tugboat hooked by a cable, rope to the ferry.
Look with your eyes:
Street View:
https://acortar.link/8JEG3XIf you rotate the image you can see that it is hooked to the ferry.
and if you look here it looks like a lifeboat that broke away from the ferry.
Street view
https://acortar.link/Dprm1tIt is the same but if you rotate it you can see other things like this.
Rau Brant join the search or investigation.