Hallo, here is the updated Version of the Riverboat. I changed most shaders to principled BSDF, correct some parts and add new ones.
For better view I added an HDRI-image from HDRI-Heaven. Please download 4k Version of
https://hdrihaven.com/hdri/?h=binnenalster
from there and add as world environment texture.
The boat itself is on layer 1 and 2. On Layer 8-10 you find "water" and the cameras. From one of this layer choose on camera as you like, add layer 1 and 2 and have a nice picture :).

I hope you will like it
Georg