I just discovered this link for adding AI boats, Cruise Liners, Yachts, Shipping liners, sailing vessels to MSFS.
I purchase all three modules from Orbx and it is absolutely incredible.
These modules brings incredible new life and realism to the water ways in MSFS.
I have been emailing the developer over some minor issues of which will be fixed hopefully on the next MSFS update.
I have also sent the developer a couple of 4K videos of the super rich who own super speed boats and hopefully will be added in the near future.
Seafront Simulations - Coastal Scenery for Microsoft Flight Simulator