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The Active Bodies feature in Phoenix allows for two-way interaction between scene geometry and the Phoenix simulation.

When an object is selected as an Active Body, the simulation both influences and is influenced by the Active Body's movement. This allows objects such as boats to float over a Phoenix ocean simulation and be affected by its waves, or objects placed on the ground to be washed away by flooding waters.

Objects selected as Active Bodies may also be animated in which case they will follow the animation while also being influenced by the Phoenix simulation. A speedboat simulation is a great example of this mutual interaction in action - the speedboat is heavily affected by the water while also able to cut through the waves and produce large amounts of foam. You can balance between the influence of the animation and the fluid from an Active Body's right click properties' Original Animation Influence option.

The ship is now behaving as expected.

You may continue this setup by adding a Phoenix Wave Force with a Phoenix Ocean Texture to generate waves in the Simulator.

The Wave Force produces real simulated waves inside the Simulator. This is an alternative to the render-time displacement you can achieve when plugging an a Phoenix FD Ocean Texture under the Displacement section of the Rendering rollout of a Simulator, which can't interact with submerged objects. The Wave Force is also driven by a Phoenix FD Ocean Texture and allows you to control how strictly the fluid will follow the pure ocean texture or how much freedom the fluid will have to splash and swirl around.