Fluid Effects > Pond > Make Boats
 
 
 

You can make an object float like a boat by adding a boat locator to it. Standard boat locators behave like dynamic locators, but also rotate in X and Z.

Fluid Effects > Pond > Make Boats >

If you want to move the position of the boat interactively, the locator cannot be connected directly to the expression. In this case, turn on Free Transform.